Context: Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
A keel-billed toucan is an example of a bird.
Select the bird below.
A. clownfish
B. Surinam horned frog
C. tiger shark
D. brown pelican
From the given choices, select the correct answer and reply with the letter of the chosen option.

D