Question

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

Explanation:

Infectious agents are live, disease - causing organisms. Soil and silt are physical particles, plant nutrients are substances like nitrates and phosphates for plant growth, and heavy metals are metallic elements. Since the question asks for live, disease - causing organisms, infectious agents fit.

Answer:

infectious agents