Question

Water contamination leads to death of aquatic species because ___ .

• A. contaminated water contains bacteria
• B. it lowers the pressure of water
• C. it decrease temperature of water
• D. it purifies the water

Answer 1

The correct option is A

contaminated water contains bacteria

Chemical contamination of water act as nutrients for algae. This helps the algae to flourish and then die. Once they die, they serve as food for decomposers such as bacteria. A large quantity of oxygen gets used up in this process. Thus, this lowers the oxygen content of water, leading to the death of aquatic species.