the leaches will be flaying in the air and it will land on the ground of a forest or sometype of grass.it will grow around lava or volcanos. it it wil start to grow inside the rocks. the rock will start to break. and over enought time the rock will start to grow into soil. then over time after making soil from the rocks around it will start to grow a forest and more and more plant will start to grow all around it.
secodary is is usaly man made or natural. like a forest fire is one. after that there is nothing left over. the afte rthat the forest will start to grow all over again from scrath. then primary comes in. and it does its thang like leaches and scrubs like that. then it will start to frow a forests and it will start to get bigger and bigge rand then we have a brand new forest.