Tree roots can push through rock and break it. what is one other way that rock waves are made?

Considering that the roots are a form of biological weathering (so/thus) erosion (from/due to) changing weather also (disintegrates/breaks down)the rock.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.