Question

which word best completes the sentence? in ecology, ______ relationships refer to mutual exchanges between two or more species whereby each species influences and benefits from the other. righteous remedial reciprocal respectable

Explanation:

The key is understanding the definition of mutual exchanges between species. "Reciprocal" means a mutual or shared relationship, which fits the context. "Righteous" relates to morality, "remedial" to correction, and "respectable" to being worthy of respect, none of which match the ecological - relationship description.

Answer:

C. reciprocal