Frogs use their tongues to catch flies, the longer a frog's tongue the more food he can get. Over time the lengths of frog’s tongues became longer, as those frogs with shorter tongues died off quickly and reproduced more slowly. This is an example of which of the following? Adaption
Natural Selection
Mutation
Variations

Natural Selection

Explanation:

The frogs with the shorter tongues died because they couldn't survive as well as the frogs with the longer tongues. Natural selection is "survival of the fittest," and the frogs with the long tongues were the fittest to survive as they could catch more food.

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