When Hermit Crabs Crawl Across the Ocean Floor, They Often

Multiple Choice

When hermit crabs crawl across the ocean floor, they often have sea anemones attached to their backs. The anemones use their dangerous tentacles to keep hermit crab predators at bay, and they dine on the particles of food that the crab does not eat. This is an example of

A) bioremediation.
B) alternation of generations.
C) symbiosis.
D) endosymbiosis.