If an author is writing a story about the moment he brought his first child home but interrupts his story to share a child hood memory of getting a new puppy, the author is using what narrative techniques?

Flashback

Explanation:

If he is remembering back to a time where he was younger than the author currently is, that is called a flashback and priorities the correct answer.

So the shape of the wing and the ability to move it through the air are the two things needed for bird and plane flight. Birds use their strong breast muscles to flap their wings and give them the thrust to move through the air and fly. In a way, birds use a swimming motion to get the lift needed to fly.