B - 17
The atomic number always matches the number of protons, or 17 p as listed in the image.
Hope this helps!
The answer is A as corals are very delicate to their surroundings
<span>He will experience a gradual drop in his testosterone levels as he ages. This will cause a lowered amount of energy and could cause a slight gain in weight. In addition, he may experience fatigue, a loss of body hair, and a general decrease in his strength.</span>
B)
Because it flows. I dunno about you, but that sounds like a liquid to me! Sorry if i'm wrong.
Answer: The population will evolve, leaving only those genetically equipped to deal with low oxygen levels. brainliest
Explanation: