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.
An African bullfrog is an example of an amphibian.
Select the amphibian below.
A. sugar glider
B. tiger salamander
C. loon
D. sea otter
Determine the correct option from the provided choices and reply with its corresponding letter.

B