Instead of clear cutting land and moving on, a local lumber business decides to start farming trees, planting the fields they have just cut with saplings. the impact this strategy will have on the environment is best described as what

If these were the missing choices:
A) Positive, since it is needed for the local bird population. 
B) Negative, since it is destroying much of their environment. 
C) Positive, since it is a sustainable plan to use a renewable resource. 
D) Negative, since it is a sustainable plan to use a renewable resource.

My answer would be: C) Positive, since it is a sustainable plan to use a renewable resource. 

Renewable source is defined as resources that can be replenished overtime by natural processes. Farming trees is one of the processes that produces renewable sources. 

The answer is A. Hopefully this will help you