Use reasoning to answer the following question. What is one reason birds have covered bodies?\nOptions:\n- (A) To help them burrow\n- (B) They have thick fur\n- (C) layers of fat\n- (D) To help them fly\n- (E) To keep their body heat.\n- (F) To attract predators\n- (G) with their fur\n- (H) To make them heavier
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Feathers help birds fly and provide insulation. Birds have bodies covered with feathers. Birds bodies are covered to help them fly and provide insulation.
So, the answer is (D).
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