PLZ HELP, WILL GIVE BRAINLIEST TO WHOEVER SHOWS WORK​

explanation:

i think option no d is the correct answer

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:

it means there are 3 atoms of oxygen

the volume increases