The feature of a map that relates a distance on the map to a distance on Earth's surface is called the A scale.
B. symbol.
C. degree
D. prime meridian

scale

Explanation:

The scale will usually tell how many miles an inch represents, or how many kilometers a centimeter represents.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).