How does deforestation affect the water cycle?

Trees absorb carbon dioxide, so D is false.

Transpiration means the process of absorbing carbon dioxide, so C is false.

Eutrophication means enriching ponds and lakes with nutrients. Bare ground allows a lot of soil to be washed away, but that is not directly related to the water cycle.

A is the only choice left so it is the answer even if you don't know why. If trees don't absorb sunlight the ground does, and warm ground causes rising air currents which push the rain someplace else.

Always learn the words very well so you can figure out stuff like this. I mean get a dictionary and carry it around so you can read it when you have nothing else to do. A side effect is that you start noticing that very few people actually know what they are talking about.