mainland create hydrogen in sand & wants in sand loosen that sand ->  earthworm can help loosen the soil by creating tunnels  earthworm can help loosen the soil by creating tunnels & the fog of sand potato the fast of space in that sand ->  earthworm creating tunnes can increase the amount of oxygen in the soil  earthworm creating tunnes can increase the amount of oxygen in the soil & revolution entering in space through branch open to the bottom of the sky -> more oxygen is available for tree roots