Final answer:
Political parties, interest groups, and the media all play important roles in the development of public policy.
Step-by-step explanation:
Political parties, interest groups, and the media play important roles in the development of public policy. Political parties are groups of people with similar interests who work together to create and implement policies. They gain control over the government by winning elections and use party platforms to guide legislation and inform party members' voting on important issues.
Interest groups are organizations that try to influence public policy. They have opinions about what should be done and desire to influence policy. They work with political parties and support candidates sympathetic to their views in order to gain access to decision-makers and influence policy.
The media serves as a linkage institution that connects the government and the people. It reports the news, helps determine the public agenda, and motivates people to become politically engaged. It also helps oversee and monitor the actions of politicians.