Feathers help birds fly and stay warm.

Meaning: This sentence describes the functions of feathers, which are to help birds fly and keep them warm.

Choice of Words: Feathers are lightweight structures that cover the body of a bird. Help means to provide assistance or make something easier. Birds are feathered creatures that can fly. Fly means to move through the air using wings. Stay means to remain in a particular place or condition. Warm means having a relatively high temperature. This sentence explains the function of feathers, which is to help birds fly and maintain their body temperature.

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