The cardiovascular system is your heart and blood vessels. If it stopped working, that would affect your whole body
The correct answer is B. Addiction
Answer:
It will be endorphins
Explanation:
any of a group of hormones secreted within the brain and nervous system and having a number of physiological functions. They are peptides which activate the body's opiate receptors, causing an analgesic effect.
It really depends due to the fact that many people learn differently some people are fast learners, some are slow paced and others are just in between. Independent study’s is good for going at your own pace without anyone pushing you.