Answer:
Option (C)
Step-by-step explanation:
During the time of rainfall or snowfall, the raindrops fall through the region of concentrated atmospheric particles such as aerosols, dust, and other tiny particles.
These particles then stick with the raindrops or snow and are brought down from the atmosphere to the ground surface. This process of combining the rain or snow with the atmospheric particles is commonly known as Coagulation. This helps in the reduction of air pollution.
Thus, the correct answer is option (C).