Question

what is mean by eutrophication of nitrate and phosphate​

Answer 1

Answer:

Eutrophication is when the environment becomes enriched with nutrients. This can be a problem in marine habitats such as lakes as it can cause algal blooms. ... Some algae even produce toxins that are harmful to higher forms of life. This can cause problems along the food chain and affect any animal that feeds on them.

Explanation:

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Answer 2

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An overabundance of nutrients—primarily nitrogen and phosphorus—in water starts a process called eutrophication.

When the algae die, they are decomposed by bacteria—this process consumes the oxygen dissolved in the water and needed by fish and other aquatic life to "breathe".