Final answer:
Political science is the study of government, investigating the reasons behind governmental decisions and the influence of individuals and groups on government actions.
Step-by-step explanation:
Political science is called the study of government because it focuses on the systematic study of political phenomena and investigates the reasons behind the decisions governments make. Political scientists examine how individuals and groups influence government actions and how government decisions affect individuals and groups. They use the scientific method to understand the political world, develop accurate depictions through logic, reason, and evidence, and are always tentative about their conclusions.