Context: Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A gray tree frog is an example of an amphibian.
Select the amphibian below.
A. human
B. African bullfrog
C. loon
D. Banggai cardinalfish
Identify the correct option from the choices provided and respond with the letter of the correct option.

B