Which of the following describes the relationship correctly? a. air expands, becomes less dense, and rises. b. air expands, becomes denser, and sinks. c. air contracts, becomes denser, and rises. d. air contracts, becomes less dense, and sinks.

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:

lol idk man i guess u gotta ask bill nye the science guy