Answer:
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
What is it that you must give before you can keep it.
The root tops the trunk on this backward thing, that grows in the winter and dies in the spring.
Different lights do make me strange, thus into different sizes I will change.
Green arrows grow out of my sides. I go from yellow to white. My babies fly in the wind. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?