Question

multiple-choice question
how does the mudskipper keep its skin wet?
goes back underground
rolls in the mud
waits for rain
eat wet foods

Explanation:

Mudskippers are amphibious fish that live in muddy coastal areas. To keep their skin wet (which is important for respiration through the skin), they roll in the mud. Going back underground is not a typical behavior for keeping skin wet, waiting for rain is unreliable, and eating wet foods doesn't contribute to skin moisture.

Answer:

B. rolls in the mud