Answer:
C. secondary succession
Step-by-step explanation:
Secondary succession occurs when a disturbance such as a fire, storm, or other event disrupts an existing ecosystem, and the community of organisms that previously inhabited the area begins to re-establish itself. In the case of a tornado destroying a deciduous forest, the ecosystem that was present before the tornado would be disrupted, and secondary succession would begin as the community of plants and animals in the forest begins to re-establish itself.