Which one of the following molecular formulas is also an empirical formula? H202 H2P406 C6H602 C2H650​

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's all four options.

the correct answer is:

a. formation of precipitation