Describe how primary succession following a volcano is different from secondary succession following a forest fire.

The Primary succession can be defined as an area that was not occupied earlier, barren, and uninhabited and there was no vegetation.  

The secondary succession can be defined as the area in which previously there is a growth of a community and it is occupied, inhabited and has primary vegetation but it was got disturbed due to some external or internal factors.

Example of primary succession: Bare rock,Volcanic eruption, and Desert, while that of secondary succession will include earthquake, flood, forest fire etc

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?