Question

what class of water pollution includes live, disease - causing organisms found in human waste and animal waste products?
infectious agents
plant nutrients
soil and silt
heavy metals

Explanation:

Live, disease - causing organisms are infectious agents. They are present in human and animal waste and can contaminate water, leading to water - borne diseases. Plant nutrients are substances like nitrogen and phosphorus, soil and silt are particulate matter, and heavy metals are metallic elements like mercury and lead.

Answer:

infectious agents