I do believe that it is both naturally occurring and caused by human activity. Although science has proven that it is something that naturally progresses with time, humans have sped up the process. Hope this helps:)
Answer:
True
Explanation:
It does result in a copy of the original molecule
The buffalo population in the Serengeti was regulated by adult mortality which was caused by undernutrition as a result of food shortage. ... The effect of interspecific competition could result in a complex regulation of populations through their food supply.