Genetic Variation: There two populations of deer. One population is light brown and the other population is dark brown.
Overproduction & Struggle for Survival: Dark deer are more likely to be seen in their environment. The reason they're more likely to been seen is because their fur color. Struggle=Fur Color
Differential Survival & Reproduction: The color of the dark deer fur affected their population. The other deer with the lighter fur were able to survive and reproduce they survived because of them being able to camouflage. Survive=Camouflage
Change in the Gene Pool: The deer with the light fur reproduce and created new generations. Which caused their population to increase. The deer with the dark fur wasn't