Pistol shrimps and gobies depend on each other for their shelter and protection and they have a beneficial relationship with each other what’s this symbiotic relation called

Mutualism

Explanation:

The term interspecific cooperation or Mutualism refers to the phenomenon when two organisms of different specie co-exist in such a way that both get benefit from each other due to their some characteristic features.

For example: in the example mentioned in question, Pistol Shrimps and Gobies co exist in a mutualistic relationship.

What happens that shrimp  not only builds but also maintains a burrow as a habitat in which both shrimp  and Gobies live and in turn Gobies protects the shrimp from the attack of predators.

There are several examples of mutualistic associations between living organisms and it it is one of the best types of symbiotic association in which no organism gets harm.

Hope it help!

what's the question ?

the answer is "a.) well–developed vascular system."

explanation: