Answer:
breathing in and out
Explanation:
the action or process of inhaling and exhaling breathing
movement of humans,animals and goods from one location to another
1 respiration the chemical process whereby energy rich molecules, example glucose,is chemically broken down to release energy.
D. fingernails
Skin, hair, and vertebrae are all the outer layer of the body and protect the body. The fingernails aren't part of that.
