Which choice most logically completes the text?

Question

Glass frogs have translucent skin through which leaves beneath them show, softening their outline. On a sunlit leaf, the effect makes a resting frog remarkably hard to see. Researchers found, however, that the same frog placed on dark bark is conspicuous: with little light passing through its body, its outline reads clearly against the surface. The finding indicates that ____

Accepted Answer

A. the frogs' camouflage works only in settings that match how it evolved.. The frogs vanish on sunlit leaves but stand out on dark bark — so the camouflage is tied to the leafy, lit conditions it evolved in.

Answer

B. transparency is the most effective form of camouflage in any environment. — The bark example shows transparency failing in some environments, refuting 'any environment.'

Answer

C. predators cannot detect glass frogs under any lighting conditions. — The text says the frogs are conspicuous on dark surfaces, where predators evidently could detect them.

Answer

D. glass frogs change color to match their surroundings. — The text attributes the effect to letting light pass through, not to changing color.

Information and Ideas practice question

Answer: A. the frogs' camouflage works only in settings that match how it evolved.

Why the other answers are wrong

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