Question

there are several different infectious agents that can pollute water. some examples are the bacteria that cause cholera and the parasite known as giardia. what is another type of infectious agent that can be found in water? viruses venomous snakes

Explanation:

Viruses are a common type of infectious agent that can contaminate water. Venomous snakes are not infectious agents for water - they are animals and not relevant to water - borne infectious agents.

Answer:

Viruses