What are the elements of molecules in lipids, nucleic acids and proteins. HELP PLS

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

a. by using fur or clothes to trap heat energy near the body