Detailed Solution:
The correct answer is “Both (A) and (R) are true and (R) is the correct explanation of (A)”.
The Indian Ocean has become a focal point for military activity by major powers. This is largely due to the significant geopolitical benefits it offers. The region is strategically important for trade routes, energy resources, and access to key markets.
Additionally, the Indian Ocean Rim countries are diverse and often politically unstable, making the region a potential flashpoint for conflict. As a result, major powers have sought to establish military bases and presence in the region to protect their interests, maintain stability, and project power.