Question

Near a factory, the river was found having dead aquatic life. what could be the reason for
this. why do you think so?

Answer 1

Answer:

because they dump toxic waste in rivers which is harmful for aquatic animals

Answer 2

Answer:

dead zones occur because of a process called eutrophication, which happens when a body of water gets too many nutrients and commerce which is phosphorus and nitrogen at normal levels, these nutrients feed the growth of an organism called bacteria called cyanobacteria or blue green algae