What is non-metal???​

In chemistry, a nonmetal is a chemical element that mostly lacks the characteristics of a metal. Physically, a nonmetal tends to have a relatively low melting point, boiling point, and density. A nonmetal is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity

Non- metals are mostly soft in nature which don't show the property of malleability and ductility .

Non-metals are not good conductors of heat and electricity.

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is in the form atp or adenosine triphosphate

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