Question

21) What would happen if birds didn't have hollow bones?​

Answer 1

Answer:

If the bones of the birds were not hollow they:-

1. Wouldn't be able to fly.

2. Wouldn't be able to breathe.

Answer 2

Answer:

The bones if not hollow then it will not help the birds to fly because the hollow bones are the reason these birds are able to fly or else this bird would be as any other animals to walk on land.

Hey Mate here is your ans plz mark me the brainliest : )