After Reading the Paragraphs Below, Answer the Question(s) That Follow(s)

Multiple Choice

After reading the paragraphs below, answer the question(s) that follow(s) .
Corals belong to phylum Cnidaria. The reefs themselves are made up of millions of polyps, each of which secretes a calcium carbonate skeleton that becomes part of the reef structure. Coral, which are attached to the reef as adults, have free-swimming larvae that develop into new polyps.
Corals are actually colourless. The brilliant colours that are visible on the reef come from the zooxanthellae (microscopic algae) that live within their body tissues. The zooxanthellae and corals have a symbiotic relationship in which corals provide carbon dioxide and mineral nutrients (released as wastes from coral digestion) to the zooxanthellae. The zooxanthellae perform photosynthesis. Photosynthesis produces nutrients (in the form of sugars) for the coral and also releases oxygen. This relationship supplements energy from predation and allows corals to survive in clear tropical water, even though these areas have very low nutrient levels.
-Coral bleaching occurs when the zooxanthellae are lost from the coral for a variety of reasons. What will be the important functional outcome of this for the coral?

A) a change in colour
B) a loss of the ability to acquire nutrients from photosynthesis
C) a loss of the ability to reproduce
D) a loss of motility