Feathers provide warmth.
Meaning: This means that feathers help to insulate birds and keep them warm. It's like saying, Feathers trap air close to the bird's body, providing a layer of insulation that helps to keep them warm.
Choice of Words: Feathers are the light, flexible structures that cover the bodies of birds. Provide is a verb that means to give or supply something. Warmth is the quality or state of being comfortably warm.
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