The study of geopolitics focuses on:

The study of geopolitics focuses on the influence of geography on politics and international relations. This field examines how geographic factors such as location, natural resources, physical terrain, and demographic distributions shape political behavior and power dynamics both within countries and across borders. Geopolitics takes into account the strategic interests that arise from geographic realities, influencing how nations interact with one another and pursue their foreign policies.

By understanding how geographical elements affect political decisions, scholars and policymakers can better analyze conflicts, alliances, and diplomatic strategies. This is particularly significant in today's global landscape, where geographical considerations remain central to international relations and geopolitical strategies.

The other options touch on important areas within international business and diplomacy but do not specifically address the primary focus of geopolitics. Trade agreements and economic sanctions are more related to economic policies and their effects on international relations, while the development of international law pertains to legal frameworks governing state interactions rather than geography's role in shaping these relations.