Answer:
1. Autocracy
An autocracy is a system of government in which one person holds absolute power in the country. The ruler of an autocracy is called an autocrat. The decisions of an autocrat are not restricted by law nor popular control. Modern-day forms of autocracy are dictatorships and absolute monarchies. An example of an autocracy, or to be more precise, a dictatorship, is North Korea.
2. The prime minister act as head of the national government in a parliamentary state ONLY
In the presidential system of democracy, the president fulfills the role of the chief executive. He is elected directly by the people. In this system, the executive, legislative, and judiciary branches are independent of each other, and no branch can affect the others.
In the parliamentary democracy, the executive is the prime minister, the head of the parliament. Most parliamentary systems have a separate president or constitutional monarch, who is usually just a ceremonial figurehead, while the prime minister is the true head of the government.
3. Being elected by popular vote
Democracy is a system of government which depends on the will of the people. The main way of making important decisions is by voting. Democracy can be thought of as the power of the people; the name has Greek origin and is formed by Greek words demos, meaning people, and kratos, which means power. The main rule this system follows is "Rule of the majority".
4. A universally free voting system
As previously stated, voting is how decisions are made in a democracy. Democracy is a government by the people, for the people. If that condition is not fulfilled, we cannot talk about democracy anymore.
5. To preserve the connection between voters and the government
There is no need to limit the amount of time a person can remain politically active. The elected official can remain on their position as long as the people want them to. But, after some time they need to get permission for their mandate to continue in office. If people are satisfied with their work, they can be reelected. If not, a new official is chosen. That is the way a connection between the voters and the government is maintained. That's why elections are held at fixed regular intervals.
6. Parliamentary democracy
The voters elect the members of the Parliament, and then the National Assembly (the lower house of the Parliament) elects the President. That way the voters indirectly affect the choice of the President. That makes South Africa a parliamentary democracy. However, unlike most parliamentary democracies, in South Africa, the President is both the head of the state and the head of the government, while depending on the Parliament.
7. The Republic of Kenya
The Orange Democratic Movement is a central-left political party in Kenya. The ODM campaigned for the 'no' vote on Kenyan constitutional referendum of 2005 and won, as more than a half Kenyans voted against the proposed constitution. This lead to President Mwai Kibaki dismissing his entire cabinet. The ODM claimed that this was a victory against the Kibaki regime, but Kibaki was reelected in 2007 nonetheless.
8. Presidential democracy
Based on the given information, we can see that the president has the most power in Nigeria. He is the chief executive and that makes Nigeria a presidential democracy. Unlike a parliamentary democracy, here the parliament doesn't play such an important role, and the president is not just a ceremonial figurehead.
9. The per capita income is higher for people living in Kenya
We can see that less money is spent on healthcare in Sudan than it is in Kenya. We could expect that illness rates are higher and life expectancy is shorter for people living in Sudan, and the opposite to be the case in Kenya. But, studies show that in 2011, in Kenya 1 600 000 people were living with HIV, while in Sudan that number was closer to 54 000.
A direct result of more money from the national budget being invested in healthcare in Kenya is a higher per capita income. The more money the state spends, the less money an individual has to spend on healthcare, and that means more income per capita (per capita = for each person).
10. Stable governments that can spend more money on infrastructure and healthcare
Spending more money on infrastructure and healthcare would allow more programs and healthcare providers specialized in AIDS treatment. This would also prevent more cases of it. Stricter laws prosecuting people who knowingly spread HIV wouldn't be a solution to the problem, poor jobs are not the cause of it, and creating a more hygienic environment would reduce rates of other diseases, but not HIV. So, the last option seems like the best one.