Final answer:
Ostrander's three levels of integration in international relations are individual, state, and system.
Step-by-step explanation:
Ostrander's three levels of integration are individual, state, and system.
Individual level: This level focuses on the actions, behaviors, and beliefs of individuals. It examines how individual decisions and personalities shape international relations.
State level: This level examines the characteristics and actions of states as actors in international relations. It analyzes factors such as a country's government, policies, and resources.
System level: This level looks at the overall international system, including how states interact and the impact of global factors such as power distribution, alliances, and international institutions.