How do corals react when water temperatures are too high?
A)They migrate to areas with lower water temperatures.
B)They slow down their shell-building processes.
C)They expel their symbiotic algae.
D)They reproduce in large numbers.
E)They produce more pigment.

Question

Quizplus · Accepted Answer

When water temperatures are too high, corals undergo a process called coral bleaching, during which they expel the symbiotic algae that live in their tissues. This leads to a loss of color and is often fatal for the coral if the algae do not return quickly enough.

Therefore, the best choice is C.

How Do Corals React When Water Temperatures Are Too High