Why is line used to show a route on a map?

Because line makes direction and route clear

A line is useful on a map because it can represent movement from one place to another. A route line joins a starting point and a destination, and its bends show turns or changes in direction. Different line styles or symbols can also distinguish roads, paths, railways, rivers, or boundaries. In this way, a simple visual mark communicates spatial information clearly.

Option A expresses this purpose: a line makes the direction and route understandable. The other choices describe actions that a drawn line cannot perform. It does not change weather, record sound, or physically cut paper; those are unrelated to the symbolic role of line in art and maps. Therefore option A is correct because it matches how lines communicate direction and connected paths.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Line.