Certain traits become more or less common in a population as a result of differential reproductive success. which of the following examples describes the condition most likely to change the frequency of a trait within a population? explain why.

f. a large coal mine has been closed and abandoned, thus providing a brown bat population with a new hibernation site.

g. the food availability for a population of brown bats is severely diminished when a drought reduces the number of mosquitoes

h. injured brown bats are taken to a rehabilitation centre where the animals can recover before they are released into the wild.

i. after a gestation period of 50 days, female brown bats give birth to healthy pups that remain with their mothers for three weeks.