In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments
That would be C. Deforestation. Tree and plant roots keep the soil in place, when they are removed, there is nothing stopping the soil from blowing or washing away. Hope this helps!
It will increase because of decreased photosynthesis. Photosynthesis uses carbon dioxide to function. So, the carbon dioxide levels would go up as the oxygen levels go down.
I hope this helps!
~cupcake