What happens due to coral reef damage by el niño? a. the ocean water gets warmer. b. fish that depend on the reef die. c. the ocean water gets cooler. d. the reef supports more diversity of life. select the best answer from the choices provided?

I believe the correct answer is B, fish that depend on the reef die. 
El nino is a temporary change in the climate of the Pacific ocean, in the region around the equator. It occurs every 2 to 12 years, and mostly brings about negative effects such as Rain, flash floods, and mudslides, in places where there is usually little rain, while usually wet areas suffer from drought. Damage of the coral reef by el nino will cause the death of fish that depend on the reef.

That is false even though water expands when frozen nothing changes at all