Question

it is estimated that 80% of all__________is untreated and flows directly into the indias rivers, making it a major source of water pollution.
which answer best goes into the blank in the prompt?
a erosion
b raw sewage
c pesticides
d mining surplus

Explanation:

Raw sewage is wastewater that contains human waste, soaps, detergents, and other contaminants. When untreated, it flows into rivers and causes water pollution. Erosion is the process of soil being worn away. Pesticides are chemicals used to kill pests. Mining surplus is the extra material left over from mining. Since the blank is about a major source of water pollution that is untreated and flows into rivers, raw sewage is the most appropriate choice.

Answer:

B. raw sewage