Answer: C. Occurs after a fire or flood
Explanation: fire destroys majority of different types of trees and plant life. Due to remnant of seeds and roots in the soil after a period of time, these roots and seeds begin to germinate again.
flood ruin farmlands however, because the soil and some plant roots are not entirely washed off, over the course of many years a natural secondary succession can occur and the vegetation that had previously grown there can grow again.
