Why are a land boundary and a coastline considered two different forms of contact in understanding India's extent?

Correct answer: A land boundary connects India with neighbouring countries, while a coastline connects it with maritime routes and seas

The governing concept is that boundaries describe different kinds of spatial contact. A land boundary is a line of contact across land with neighbouring states; it is important for borders, movement, political relations, and terrestrial trade. A coastline is the contact between land and a sea or ocean; it supports ports, maritime trade, fishing, offshore resources, and naval security. Because these contacts operate through different environments, they cannot be treated as the same measurement or function. Option A is correct. Option B confuses boundaries with area, while C incorrectly calls them latitude coordinates. Option D refers to time, which depends mainly on longitude and rotation, not on the mere existence of a boundary or coastline.