Question

a relationship between two species in which both species benefit
camouflage
symbiosis
mutualism
commensalism

Explanation:

Mutualism is a type of symbiotic relationship where both species benefit. Camouflage is a physical adaptation for hiding. Symbiosis is a general term for close relationships between species (which includes mutualism, commensalism, and parasitism). Commensalism is a relationship where one species benefits and the other is neither helped nor harmed.

Answer:

mutualism