Question

how does biological weathering occur? due to physical factors such as freezing and thawing by chemically breaking down rocks by gases plants, lichens, and mosses accelerating breakdown

Explanation:

Biological weathering involves living organisms. Plants, lichens, and mosses can grow on rocks. Their roots or growth can physically break rocks apart (e.g., roots growing into cracks and expanding them) or release substances that chemically alter rocks. Freezing and thawing are physical weathering (not biological). Chemical breakdown by gases is chemical weathering (not biological).

Answer:

plants, lichens, and mosses accelerating breakdown