A. Releasing a stimulus when hormones increase or decrease I think
Answer:
Electrical energy Explanation:
We use it to charge our phones and important devices. We also use it to power almost everything.
C. 11 is your answer
1) integumentary
2) muscular
3) skeletal
4) nervous
5) circulatory
6) lymphatic
7) respiartory
8) endocrine
9) urinary/excretory
10) digestive
11) reproductive
hope this helps