Respuesta :
Yes, It is C because If there is a decrease in hawks, then there will be more chipmunks. :)
Competition would be the conflict between two populations who eat the same food/ use the same resources, so C would not be the answer. C is an example of Predation. I would say A, as an epidemic among chipmunks would decrease the size of the population. There would be less chipmunks in the population to compete for food.