Question

The main problem caused by the use of pesticides is

• A. Their residues persist in water and other components of the environment.
• B. Mosquitoes have become resistant to DDT.
• C. They kill silk worm.
• D. They deform the gills of some fishes.

Answer 1

The correct option is A Their residues persist in water and other components of the environment.

Although there are benefits to the use of pesticides, there have also been many problems associated with their use. When pesticides are used, they do not always stay in the location where they are applied. They are mobile in the environment and often move through water, air and soil. The problem with pesticide mobility is that when they travel, the pesticides come in contact with other organisms and can cause harm.
Therefore, the correct answer is option A.