Abrasion can polish rock surfaces. true or false

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

you need to stop taking that class