Context: Reptiles have scaly, waterproof skin. Most reptiles live on land.
Reptiles are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A western rattlesnake is an example of a reptile.
Select the reptile below.
A. green tree frog
B. human
C. salmon
D. green iguana
Identify the correct option from the choices provided and respond with the letter of the correct option.

D