I believe it is d
good luck
Answer: Cross connections may result in black flow the causes the contaminants to enter the pearl water supply under certain conditions. A backflow is a change of pressure in the water pipe the focuses water to flow opposite to its intended direction, allowing contaminates to enter the unprotected system.
Explanation:
I believe the muscle contracts
Answer:
Physical fitness refers to the ability of your body systems to work together efficiently to allow you to be healthy and perform activities of daily living. Being efficient means doing daily activities with the least effort possible.
Explanation:
Answer:
the second to last one which is hanging out with different people