which of these functions is performed by both political parties and pressure groups?

Both political parties and pressure groups perform the function of interest aggregation and articulation. Interest aggregation and articulation refers to the process of bringing together the diverse interests and opinions of different groups in society and giving voice to those interests and opinions. Political parties and pressure groups both play a role in this process by representing the views of specific groups of people and advocating for those views in the political arena. For example, a political party may represent the interests of a particular demographic, such as workers or rural residents, while a pressure group may represent the interests of a particular cause, such as environmental protection or animal rights. Both political parties and pressure groups aim to influence the decisions of policymakers and bring about change on behalf of the groups they represent.