Exercises that work the core are exercising muscles found in the
a.
arms
b.
chest
c.
abdomen
d.
legs

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.