Birds have ___________ bones which helps them in flying. Options: A . &nbsp heavy B . &nbsp dense C . &nbsp big D . &nbsp hollow

Birds have ___________ bones which helps them in flying.

Question -

Birds have ___________ bones which helps them in flying.

Options:

A . heavy

B . dense

C . big

D . hollow

Answer: Option D
:
D
Birds have hollow bones. These bones make their body lighter and helps them in flying.

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