I would say A. The three other choices could lead to its start.
Answer:
A. Demonstrate proper technique la for yoga and aerobics
Answer:
Transportation of essential gases an nutrients, waste and unwanted products
Explanation:
the key feature of circulation is transportation of essential gases and nutrients around the body of an organism, removes unwanted products of metabolism from the tissues, and carries these products to specialized excretory organs, if present.
<span>A. personal safety, pollution, and extreme temperatures</span>
