Succession allows ecosystems to
a. recover from disruptive events
b. reach a stable and sustainable point
c. establish complex communities
d. all of the above

Succession allows ecosystems to d. All of the above.
Succession allows ecosystem to recover from disruptive events, reach a stable and sustainable point and establish complex communities. Succession by the way refer to the changes that happened in the ecosystem and develop over time.

Yes he thought they should be left to chance why, because he thought that was the best thing to do