Question

unit exam - earth systems
rocks by water and gases, often causing them to disintegrate.
biological weathering is driven by organisms like plants, lichens, and mosses, accelerating rock breakdown by chemically altering rock substances.
which of these describes physical weathering?
rocks being broken down by freezing and thawing
plants, lichens, and mosses breaking down rocks
minerals in rocks being broken down chemically

Explanation:

Physical weathering is mechanical breakdown. Freezing - thawing is mechanical; plant - related is biological, chemical breakdown is chemical weathering.

Answer:

rocks being broken down by freezing and thawing