A population of insects has a brown color, providing them with camouflage on the desert sands where they live. Over thousands of years, climate changes in the area cause grasses to grow, and the population of insects becomes green over the same period of time. Which term describes what has taken place in the population of insects? a. mutation
b. evolution
c. migration
d. variation

B.

Explanation:

Evolution is a change in the gene pool of a population over time. It occurs throughout the whole population. The gene pool in this situation changes from consisting of genes for mostly brown-colored insects to green. Mutation only occurs in individuals. Migration refers to population moving locations. Variation is just the different genes in a gene pool.

d statement

explanation:

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.