Describe an environmental factor that could
influence natural selection and decrease genetic
diversity. Pick a specific example to illustrate your
point.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.

idk what happened..you tell