A river with an inflow of domestic sewage rich in organic waste may result in

Options

A. Increased population of aquatic food web organisms
B. An Increased production of fish due to biodegradadable nutrients
C. Death of fish due to lack of oxygen
D. drying of the river very soon due to algal bloom

Answer

C

Explanation

A river with an inflow of domestic sewage rich in organic waste will redue the dissolved oxgen (DO). The organic waste will increase biological oxgen demand of the river thus depleting the `O_(2)`content and may result in death of fish due to lack of oxygen.