Explanation

We are told that adult frogs in general are vulnerable to dehydration because their skin is highly permeable. We also know that due to their low ratio of body weight to skin surface, small adult frogs, UNLIKE LARGE ADULT FROGS, cannot survive in arid climates. We know that the animals' moisture requirements constitute the most important factor in determining where frogs can live in the Yucatán peninsula, which has an arid climate in the north and a wet climate in the south. So, based on the info above, we know that the small adult frogs can only live in the south of the Yucatán peninsula, since they cannot live in arid regions. Whereas, the large adult frog does not have this restriction, meaning they can inhabit the north and south of the peninsula. Thus, answer choice (C) is most strongly supported by the info in the passage: "Large adult frogs can live in more of the area than small adult frogs can." Hope that clears things up! Please let us know if you have any other questions.

But it says adult frogs are vulnerable to dehydration so if they live in a rigid (dry) place (north) wouldnt they not survive?

Nvm i missed the LARGE part