The effects of air pollution are influenced by:

Air pollution is affected by a variety of environmental factors, and each of the elements mentioned plays a significant role in how pollutants are distributed, transformed, and removed from the atmosphere.

Wind speed and direction are crucial for the dispersion of air pollutants. Strong winds can carry pollutants away from their source, reducing concentrations in one area while potentially increasing them downwind. Conversely, low wind speeds can lead to the accumulation of pollutants, particularly in urban areas where emissions are higher.

Sunlight also influences air pollution, especially in terms of photochemical reactions. Certain pollutants, like nitrogen oxides and volatile organic compounds (VOCs), react in the presence of sunlight to form ozone, a key component of smog. Therefore, sunlight can exacerbate air quality issues during certain conditions, such as warm and sunny days.

Precipitation acts as a natural cleaning mechanism for the atmosphere. Rain can remove particulate matter and gaseous pollutants by "washing" them out of the air. However, it can also lead to the deposition of these pollutants into water bodies, contributing to other environmental concerns.

Given the interconnectedness of these factors and their collective influence on the behavior and impact of air pollution, it is correct to conclude that all of the mentioned options are influential. This comprehensive understanding