My first thought would be to use the light in the sky for help. stars and moon as night and sun as day, you can tell by when the sun rises and moves.
Answer:
Energy flows through the organisms from bottom to top and increases at each level.
Explanation:
The first option is the correct awnser
I think the answer is a sorry if I get it wrong
The things that birds have attached to their bodies called their wings, a left one and a right one, cause them to have the ability to fly.
