Why is the Tropic of Cancer helpful in understanding climatic division in India?

Correct answer: It helps distinguish the location of northern and southern India

The Tropic of Cancer is an important latitude at approximately 23°30′ north. It passes through the central part of India and provides a useful reference for comparing the country’s tropical and subtropical settings. Areas south of it are generally within the tropical zone, whereas much of the area north of it has subtropical characteristics, though actual climate is also modified by altitude, relief, monsoon winds, distance from the sea, and other factors. Thus the line helps explain a broad north-south climatic division, rather than mechanically determining every local climate. Option A is the best answer. It does not measure coastline, establish standard time, or end a boundary.