I think it’s C, but I would try to double check that! I’m so sorry if it’s wrong! :)
Pressurised force causes to form metamorphic rocks
The dispersion of pollutant gases in the atmosphere from their sources are modeled through plume. It incorporates a lot of factors like wind speed, wind direction, atmospheric temperature, height, type of terrain, overcast or clear skies and so much more. Basically, it can be summarized through unstable or stable conditions.
In unstable conditions, ground level deposition is more dispersed so the concentration is not too high. However, air pollution from elevated smokestacks are readily returned to the ground. In that case, it would still lead to concentrated ground air pollutant concentrations.
In stable conditions, elevated smokestacks are desirable because there is less atmospheric mixing. The concentration of the pollutants is more concentrated in the point sources. Hence, ground level concentration is low.
The Ganges River is a major contributing factor to population density in India. Most Indians live near the river because it is a water source and it is a holy river to Hindus.
