D. Phenotype because a phenotype is observable traits
The answer would be Igneous rocks, because of magma cooling
Pollution is always a good way to go but you don't have to do air pollution you can do water pollution or both air and water pollution.
It gets blurry and further away because it is not changing
It occurs only in cells in the reproductive structures of organisms.
Meiosis only occurs in the reproductive cells, producing gametes with half of the genetic information as the parent cell.