Most natural solid waste is recycled by the process of decay. Think about it, air and water don't rot. The only things that are recycled by rotting/or falling apart are solid things.
I would help but I see no choice to choose from.
The answer is Periosteum.
Answer:
important for your physical and mental health
Explanation:
you can stay fit by doing something simple like going for a walk, riding your bike, or taking the stairs instead of the elevator. exercising also releases hormones that make your body and mind feel good!