Question

4. Which of these features help birds to fly?
a. Streamlined body
b. Hollow bones
C. Wings and powerful chest muscles
d. All of these Which of these inints does the elbow have?​

Answer 1

Answer:

Hollow bones help birds to fly

Answer 2

Answer:

All Of These Should be the right answer.

Explanation:

All of these because Hollow bones help them to lose their so that they won't get pressure while flying. Wings help them to fly.