Answer:
Option D) Symbiosis
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 symbiosis.
Step-by-step explanation:
Symbiosis is a biological relationship between two organisms whereby both benefits food, shelter, protection etc, from each other.
In this case, hermit crabs derive protection from the sea anemone, while the latter derives food from the hermit crabs.
Thus, both hermit crabs and sea anemones benefits, showing symbiosis