What type of plant might live on rocks and break the rocks down into soil?

Lichens are a type of plant-like organism that can live on rocks and contribute to breaking them down into soil. They are symbiotic associations between fungi and algae or cyanobacteria, capable of surviving in harsh environments. As lichens grow, they secrete acids that slowly dissolve the rock surface, facilitating the weathering process. Over time, this breakdown of rock material helps create a substrate for other plants to grow.