If land was cleared 100 years ago for farming and has recently returned to its natural state, covered with plants and trees, identify the activity that took place.

a. evolutionary succession.
b. primary succession.
c. secondary succession

"Secondary succession" is the activity among the following choices given in the question that took place. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that you were looking for and the answer has come to your desired help.