Question

Hurry

Which of the following adaptations helps birds fly? They have more fat than most animals, so they can fly for long distances. They have hollow bones, so they are lighter. They have smaller blood vessels, so their hearts have to work less in flight. They have a larger stomach, so they can absorb food faster.

Answer 1

They have smaller vessels

Step-by-step explanation:

because If there heart works less,they won't have any problem having high heqatr rate

Answer 2

They have hollow bones, so they are lighter.

Step-by-step explanation:

hollow bones help with oxygen intake btw