How can biologic weathering result in chemical erosion? roots loosen soil and break rocks

plants transpire water vapor

large herds trample rocks and break up soil

bacteria release acids and other agents that break down rock

roots loosen soil and break rocks

Explanation:

Plants and animals release acid forming chemicals that cause weathering and also contribute to the breaking down of rocks and landforms.

can you attach a picture of the lettuce? : )

the millers tale is the answer.