Final answer:
In parliamentary systems with a ceremonial president, the Prime Minister is appointed by the president from the members of the legislature, reflecting the individual's ability to command the confidence of the parliament.
Step-by-step explanation:
The form of government where a Prime Minister is appointed by the president from members of the legislature is commonly found in parliamentary systems with a ceremonial president as the head of state and a prime minister as the head of government. This is characteristic of countries like Italy or Germany, where the president's role is to represent the country and ensure the constitution is upheld, whereas the prime minister, who usually comes from the majority party or coalition in the legislature, is responsible for running the country's day-to-day government affairs.
In these parliamentary systems, the ability to command the confidence of the legislature, typically referred to as the parliament, is a critical factor in the appointment of a prime minister. Hence, the individual chosen by the president tends to be a leader within the majority party or coalition because they are the ones more likely to get the necessary support from the members of the parliament.
It's important to note that while the president appoints the prime minister, they do not have the sole discretion in many parliamentary countries since the prime minister must have the backing of parliament, reflecting the blend of executive powers in such a government structure.