What is the main difference between primary and secondary succession?

Question

A.
Primary succession occurs overnight, and secondary succession occurs over hundreds of years.
B.
Primary succession occurs on land, and secondary succession occurs in aquatic environments.
C.
Primary succession involves plant populations, and secondary succession involves animal populations.
D.
Primary succession occurs on barren land, and secondary succession occurs where soil is present.

Answer 1

D. Primary succession occurs on barren land, such as rocks or sand, where no soil is present, while secondary succession occurs in areas where soil is already present but has been disturbed or destroyed, such as after a fire or flood.