The answer is B since you have to be able to prove/elaborate on the topic sentence
Answer:energy
Explanation:all activities of life including physical and chemical require energy to proceed
Answer:
The respiratory centers that control your rate of breathing are in the brainstem or medulla. The nerve cells that live within these centers automatically send signals to the diaphragm and intercostal muscles to contract and relax at regular intervals.
(hope it helped)
Explanation:
