Context: Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
A blue-footed booby is an example of a bird.
Select the bird below.
A. barn owl
B. thresher shark
C. red howler
D. box turtle
Select the correct answer from the provided options and reply with the letter associated with it.

A