Please help fhsjskdjks

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:

c. 75.7

i think that is the right

the temperature of the gas, in k, not celsius.

the answer would be b i believe