Adélie penguins are well adapted to Antarctica’s cold climate. They eat fish off the coast of Antarctica and build nests on land. The average temperature in Antarctica has been increasing. Scientists claim that if this trend continues, it may have a negative effect on the penguins’ ability to survive.

Which of the following best supports the scientists’ claim?
A. Melting ice will decrease the concentration of salt in the ocean.
B. Increasing ocean temperatures will reduce fish population sizes.
C. Increasing air temperatures will allow more plant species to grow.
D. Melting snow will increase the size of the area where the penguins live.