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Question

Harry was seeing a bird fly and was wondering why he cannot. Can you help him find one reason from the following?

A
Birds have solid bones.
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B
Birds have hollow bones.
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C
Birds have magical powers.
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D
Humans have hollow bones.
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Solution

The correct option is B Birds have hollow bones.
The bones of birds are hollow reducing their weight and making them fly. These hollow bones have an air filled cavity inside.

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