I would say A. Because c and d r very dangerous if u think about it. And b is right in some situations. But if u do a then people can see whts going on if something happened because of the light. and it is safe. If wrong let me know. :D
The types of health facilities are providing better doctors in rural areas and giving awarness to people about the diseases its causes its symptoms and how to prevent that disease
The diaphragm moves upward, making the chest cavity larger, and air flows in.
Explanation:
our chemical barriers protect almost every infection we can get in our body
