Imagine a population of beetles. Yellow beetles are easier for birds to see and eat. Gray beetles blend into their surroundings, so they are less visible to birds than yellow beetles are. As a result, gray beetles are more likely to survive and reproduce, enabling the gene for gray coloration to be passed on to the next generation. This increases the frequency of genes for gray coloration in the population. Which of the following evolutionary processes does this scenario describe? a,. genetic drift
b. mutation
c. migration
d. natural selection