Answer:
Explanation:
A major energy source for most cells is stored in a sugar molecule called When you need energy, cells release chemical energy from glucose. You need food energy to run, walk, and even during sleep. Your cells use energy from food to carry out all of their activities.
The number of cases of a disease in a specific population at a particular timepoint or over a specified period.
(I believe this is the answer!)
As all of these take up time, d would be the right answer.