Question

read the paragraph. then, add the best topic sentence.
___________ these birds are known for crowing loudly, even at volumes that could cause hearing loss. however, roosters special ears keep them from going deaf. whenever a rooster opens his beak all the way, his ear openings mostly close off. its almost like the rooster has built-in earplugs to avoid getting hearing damage from his own voice!
roosters crow at all times of day, not just in the morning.
roosters crow for a number of different reasons.
roosters have a way to keep their ears safe when they crow.
some animals are known for how loud their calls are.

Explanation:

The paragraph focuses on how roosters avoid hearing damage from their loud crowing by closing their ear openings. The correct topic sentence must introduce this core idea. The first two options focus on when/why roosters crow, which is not discussed. The last option is too broad, while the third option directly ties to the paragraph's main point of roosters protecting their ears while crowing.

Answer:

Roosters have a way to keep their ears safe when they crow.