The nervous system helps:
Receptors in muscles provide the brain with information about body position and movement.
The brain controls the contraction of skeletal muscle.
The nervous system regulates the speed at which food moves through the digestive tract.
The nervous system regulates respiratory rate
The nervous system regulates heart rate and blood pressure.
Source: https://faculty.washington.edu/chudler/organ.html
Probably B) strenuous exercise. If not B then it's probably A. I don't know for sure though
If it is the abdomen and not the stomach area i would say its from the heat. if you've ever seen a dead animal on the side of the road over the course of a few days, they start to swell from the sun beating down on them all day.
Answer:
D
Explanation:
Fossils tell us where they came from.
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