What is true of all ecosystems? The amount of mass and energy cycles through and remains the same
.B. The amount of mass always increases, while energy always decreases.
C. The amount of mass and energy only decreases.
D. The amount of mass and energy only increases.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

this is a good question! i'll do some research and come back when i have the answer!

carbon atoms, hydrogen, oxygen, and nitrogen.