Answer:
Causes : industrial wastes dumped into rivers , sewage dumped into rivers , oil spilled on land mixes with runoff .
Effects : fish die off , spread of disease , destroyed natural habitats
Step-by-step explanation:
Water pollution refers to addition of the undesirable substances to it that lower down its quality. Addition of industrial waste, domestic waste and sewage to water bodies pollute them. Oil spills reach water bodies through surface runoff. Presence of pollutants destroy these natural habitats and resultant eutrophication of water bodies lower down the oxygen availability to fishes resulting in their death. Consumption of polluted water by living beings cause many water borne diseases.