Question

which is the reason dogs pant with their tongues hanging out?
a. to breathe
b. to stay cool
c. to get attention and ask for water
d. to get rid of water in their mouth
e. to lick you

Explanation:

Dogs don't have sweat glands like humans. Panting (with tongue out) allows evaporation of moisture from their tongue and mouth, which cools them down. Option A is incorrect as they breathe normally too; C, D, E don't reflect the main physiological reason for panting.

Answer:

B. to stay cool