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 where organisms better adapted to their environment tend to survive and produce more offspring. A bat with a missing web wing is a defect, dark - colored hares in a snowy area are less likely to survive (not a result of natural selection favoring them), mosquitoes transmitting disease is about their role in disease spread, not natural selection result. Giraffes having longer necks over time is a classic example of natural selection. As giraffes with longer necks could reach more food (leaves on taller trees) and were more likely to survive and reproduce, passing on the genes for longer necks.

Answer:

giraffes having increasingly longer necks over time