SAT OwlGlass frogs of Central and South America have translucent skin on their bellies, so their hearts and other organs are visible from below. When a glass frog rests on a leaf, light passes through its body, and its outline becomes hard to see against the green leaf behind it. Biologists therefore think that this translucency ______
Which choice most logically completes the text?
allows the frogs to digest food more quickly.
makes the frogs easier for potential mates to find.
causes the frogs to lose body heat rapidly.
helps the frogs avoid being spotted by predators.
Show answer and explanation
Answer: D
The text explains that translucency makes the frog's outline hard to see on a leaf. An animal that is hard to see is harder for predators to find, so choice D follows.
Choice B points the wrong way; the text describes the frogs as harder to see, which would not help mates find them.
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