Answer:
They are called the building blocks of an organism because all living things are made up of billions of cells that can reproduce, build and change that's why it is called the building blocks of all living things.
Explanation:
I think its because when your upside down, your not breathing right. So its a way of trying to breathe correctly.
i think its solar i might be wrong
4 mps increase in 10 seconds = 2 mps increase in 5 seconds = .4meters/2sec