Answer:
I believe it's the first answer
Explanation:
Collaboration is usually identified as working with another <u>person or group</u> in order to achieve or do something.
The nervous system the main part being the spinal cord.
Answer:
my answer keeps getting deleted... just go to the provided link. it gives you the answer. this exact question is asked many times and it will have a different answer depending on what job you're talking about. just go to the link! its faster than going to brainly, anyways.