Question

which best illustrates a result of natural selection?
a bat that is born with a wing that is missing the web
dark - colored hares living in a snowy area
mosquitoes that transmit disease to humans
giraffes having increasingly longer necks over time

Explanation:

Natural selection is the process by which organisms better adapted to their environment tend to survive and reproduce more offspring. Giraffes having increasingly longer necks over time is an example of natural selection as those with longer necks had an advantage in reaching food and were more likely to survive and pass on their genes. A bat with a missing - web wing is a mutation, dark - colored hares in a snowy area are not well - adapted (opposite of natural selection result), and mosquitoes transmitting disease is about their function rather than a result of natural selection in the context of the question.

Answer:

giraffes having increasingly longer necks over time