gauge local rainfall amounts. study the area's geological history. predict the severity of earthquakes. show the surface features of an area.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: One of the functions of a topographic map is to
Possibilities:
- gauge local rainfall amounts.
- study the area's geological history.
- predict the severity of earthquakes.
- show the surface features of an area.

show the surface features of an area.