Mrs. Singh noticed that the river near her house was getting dirty and polluted with soap and detergents. What is the name of the process where soap and detergents pollute the river?
A. Boiling
B. Heating
C. Evaporating
D. Runoff
Answer:D
Mrs. Singh noticed that the river near her house was getting dirty and polluted with soap and detergents. What is the name of the process where soap and detergents pollute the river?
A. Boiling B. Heating C. Evaporating D. Runoff
Explanation: When people wash their clothes by the riverside, soap and detergent residues can wash into the river with the water used for washing. This process is called runoff, which is the movement of water over the surface of the land that can carry pollutants into the river. These pollutants can cause harm to the aquatic life and also affect people who rely on the river for drinking water or irrigation. Therefore, the correct answer is D. Runoff.