What is immigration?
O
A. When animals move into an ecosystem
O
B. When animals die in an ecosystem
O
C. When animals are born in an ecosystem
O
D. When animals leave an ecosystem

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.