A bird builds its nest in a cactus. A rattlesnake shakes its tail when threatened. A lizard crawls under a rock for shelter. The ears of a jackrabbit release heat.
I gave my students this multiple choice question: Which statement best describes a structural adaptation that helps an organism survive in a desert?

Only one answer is correct among these 4 choices:
- A bird builds its nest in a cactus.
- A rattlesnake shakes its tail when threatened.
- A lizard crawls under a rock for shelter.
- The ears of a jackrabbit release heat.

Could you tell me which one is correct?

The ears of a jackrabbit release heat.