How do volcanoes contribute to the formation of new landform?

They help form rocks which help give us the knoledge

When the volcano erupts and when the magma or lava cools down it forms to rock and then primary succession occurs first, after the rock breaks over time dirt comes and then,licken or moss the organism that breaks the rock appears after the grass or weeds come and then bushes appear and then the little trees grow and finally, a big population of trees appears.

Iheard he was so amazing they named a whole city after him somewhere in california, absolute hero, they named a country in europe after him it’s called france, they just decided to change the o to an e because yknow, bants ennit