The correct answer is: d) All of the above.
Soil erosion is the process of soil being removed from the land by the action of wind or water. It is a major environmental concern in Bihar, as it can lead to a loss of agricultural land, a decline in water quality, and an increase in flooding.
Deforestation is the clearing of forests for other uses, such as agriculture or development. It can lead to soil erosion by removing trees, which help to hold soil in place.
Overgrazing is the grazing of livestock on land at a rate that exceeds the land’s ability to recover. It can lead to soil erosion by compacting the soil and removing vegetation.
Intensive agriculture is the use of large amounts of inputs, such as fertilizers and pesticides, to produce high yields of crops. It can lead to soil erosion by removing organic matter from the soil and making it more susceptible to erosion.
All of these activities can contribute to soil erosion in Bihar. It is important to manage these activities carefully to reduce the risk of soil erosion.