Answer
The ability of some fish, like clownfish, to detect predators is decreased in more acidic waters. A sudden drop in pH can as cause medical issues, such as comas and seizures in oceanic life. Fish's skeletons are also sensitive to acidity, so their development may be impacted as well.
The answer is pollution, because solar energy is costly, difficult to maintain, and fairly complex.
B is your answer and explanation because I know ;)
1. Balances fluids.
2. Structure. Support for tissues.
