Water pollution is caused due to

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(D) Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream,river,lake,ocean,aquifer,or other body of wa

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All of these

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(D) Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream,river,lake,ocean,aquifer,or other body of water,degrading water quality and rendering it toxic to the environment and humans.$1$. Sewage and other wastes: Domestic sewage contains organic matter and pathogens that deplete dissolved oxygen in water bodies.$2$. Industrial effluents: Factories release toxic chemicals,heavy metals,and heat (thermal pollution) into water sources.$3$. Agricultural discharges: Fertilizers (containing nitrates and phosphates) and pesticides run off from fields into water bodies,leading to eutrophication and toxicity.Since all these factors contribute significantly to water pollution,the correct option is $D$.

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