Answer:
A. It is the place where energy is produced.
It stores the genetic information, the DNA (chromosomes).
Explanation:
The answer is B. Water/H2O
It's A, a limiting factor is something that constrains the population size
Answer:
He could create a schedule, block the extra things they do that isn't necessary, or even take a few breaks. When you take a break you relax your mind, and when you do that you stress less so you can be more productive.
Hope this helps and have a great day!