Sources of water pollution are relatively easy to monitor and regulate while sources of water pollution are difficult to monitor and cleanup. a. domestic; industrialb. primary; tertiary pollutantc. nonpoint; pointd. tertiary pollutant; primary

C. Point, nonpoint

Explanation:

Point source of water pollution originate from a single source and the source of origin can be determined. Industrial and sewage drainage systems are the examples of point source pollutants. The source of pollutant is easy to detect and monitor.

Non-point source of water pollution the source of pollution remains undetermined. The pollutants may enter in water body through multiple sources. Hence, it is difficult to track back the source of single pollutant. Thus non-point source pollution cannot be clean and monitored.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.