Explanation:

Explanation:

• Bioaccumulation is the accumulation or concentration of a substance such as toxic chemicals in various tissues of a living organism. Bioaccumulation takes places within an organism when the rate of intake of a substance is greater than the rate of excretion or metabolic transformation at that substance.

Also know that-

• Biomagnification is the increasing concentration of a substance such as a toxic chemical in tissues of organisms at successively higher levels in food chain. As a result of bio magnification, organisms at the top of food chain generally suffer greater harm from a persistent toxin or pollutant than those at lower levels.
• Persistent Organic Pollutants are the chemical substances than remain in the environment are transported over large distances, bioaccumulate through the food web and pose a risk of causing adverse effects to the environment and human health. PoPs include pesticides like DDT, etc.
• Eutrophication or more precisely hypertrophication, is the enrichment of a water body with nutrients, usually with an excess amount of nutrients. This process induces growth of plants and algae and due to the biomass load, may result in oxygen depletion of the water body.