Name the class of nutrients of which sugars and startches belong

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."