Answer:
due to human are using resources faster than they can be renewed replace and clean up.
Answer:
B. Changing passwords frequently makes you likely to forget which isn't helpful, using a personal e-mail address is unprofessional, only limiting the number of people and keeping it down to just enough people who need to see it can see it is truly helpful.
Good balance
Flexibility
Concentration
I am not 100% sure but i have an idea for the first box, In the circulatory system, blood is pumped into veins that carry the blood to tissues in your body. I really hope this helped you and was correct.