The correct answer is A) deforestation.
What most contributes to soil erosion is deforestation.
Forest cover about 30 percent of the land on Earth. But deforestation is affecting the ecology in many regions of the planet. One of the biggest reasons that causes deforestation is agriculture. Food industries and farmers cut the trees to harvest their crops or for livestock purposes. Logging in some cases is illegal, but countries can fight against this criminal action because in the case of third world countries they don’t have the money or the infrastructure to do it.