Difference between primery and secondary succession

Hii There,

Primary succession is like starting from nothing in a place where no living things were before, like after a volcano or glacier.

Secondary succession is when an existing community gets messed up, like if someone wrecks a garden to build something else. Secondary succession is trickier because it involves messing up a place that already had plants and animals. For example, if you had a nice garden, and someone ruins it to build a movie theater, that's secondary succession.

I hope this answers your question.

Thanks