What are 3 iliness being physically fit might help prevent?

Once you have come to a decision, you should "go" over it and

Explain what you know about the cause of mental illnesses.

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.