Given the question: Process:  - Acid rain is produced by chemicals that reach into the atmosphere - Falls onto the ground - The acid rain starts scouring rocks - Destroys vegetation - The lack of vegetation alters the surrounding environment.  Perturbation hypothesis: suppose less vegetation available happens, how will it affect LESS damage by acid rain.  Does the supposed perturbation have an effect (direct or indirect) on the process?
The answer is:
yes