What is the definition of a region politically and economically dominated by another country?

The correct answer is "sphere of influence," which refers to a geographic area where a particular country has significant cultural, economic, military, or political influence over another country or region, without formal authority or governance. This term encapsulates the idea that while the influenced region may maintain nominal independence, it is largely shaped by and aligned with the interests and policies of the dominant power.

In the context of imperialism and international relations, powerful nations often establish spheres of influence to secure trade routes, resources, and strategic advantages while avoiding the responsibilities of direct control or colonization. This arrangement allows the dominant country to exert influence and control over the political and economic dynamics of the influenced area without fully annexing it, making it distinct from other terms related to direct governance or control.

The other options refer to different forms of political control or arrangements. A protectorate involves a relationship where one state maintains control over the military and foreign affairs of another while allowing some autonomy. A vassal state usually denotes a situation of feudal allegiance, often with direct obligation and subservience. A dominion typically refers to a semi-independent polity that is part of a larger imperial structure, like Canada in relation to the British Empire. These nuances highlight why "sphere of influence"