The correct answer to this open question is the following.
Although there are no options attached we can say the following.
Farming practices affect Earth systems in that after some time of growing crops, the practice of agriculture can erode the soil of the Earth.
Yes, the soil that once was fertile can become infertile due to agriculture.
In order to have better crops, farmers also use pesticides and insecticides that damage the environment and the systems of the Earth.
These pesticides and insecticides contaminate the soil of the Earth, including plants, trees, and vegetation in general. These are toxic chemicals that can hurt birds and other important animals in the ecosystem.
