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Here's Farah at her grandpa's pond in Texas, in August. It hasn't rained for two months, and the pond has shrunk to half its size.

Frogs, catfish, dragonflies and herons all live at this pond, and the dry summer is hard on every one of them.

When the fall rains come, some of these living things will still be alive, and some will not. So what decides who pulls through when a place changes?

To find out, we will look at the body parts and the things animals do that help living things survive, and at what happens when a place turns colder, hotter or drier.

Okay, so are you ready to find out who pulls through?

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