Final answer:
Elevation key is a common feature of a physical map that helps understand the topography of the land.
Explanation:
A common feature of a physical map is an elevation key, which provides information about the height variations in the depicted area. This key assists map users in understanding the topography of the land, including mountains, valleys, and plateaus.
Learn more about Physical maps here:
https://brainly.com/question/3239106
