Energy in organisms is called homeostasis, its what keeps our bodies warm and with energy throughout our day! Hope it helps!!
Every 5 years it will be half. So
After 5 years = 10/2 = 5 grams
After 10 years = 5/2 = 2.5 grams
After 15 years = 2.5/2 = 1.25 grams
The answer is A and here is everything written out, hope it helps! :)
Bones are the structure of the body, muscles allow the bones to move, nerves allow messages to be sent back and forth from the brain to the mucells telling them to move, joints join the bones of your body and allow them to move.