Its main purpose is to restore partial flow of oxygenated blood to the brain and heart. ♥
Answer:
Sends you unwanted, explicit pictures and demands you send some in return. Pressures you to send explicit videos. Steals or insists on being given your passwords. Constantly texts you and makes you feel like you can't be separated from your phone for fear that you will be punished.
C. that is your answer because as your heart contracts, blood flows and IF your heart is not strong enough, it will be hard to breathe.
C. moving food through the body and transporting air through the body