The correct answer is option D
The impact of wildfires are air pollution, soil erosion and water pollution. It contributes in all of them.
The burning of plants, seeds and other components releases carbon dioxide in the environment. This causes air pollution.
Wildfires can also cause soil erosion as it erodes the upper layer of the soil.
The eroded soil, ashes and other left behind substances are sometimes are carried out in the nearby area (pons, lakes and streams) and causes water pollution.