Question

chemical weathering is the alteration of minerals within 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.
what is the source of parent material for soil?
bacteria and algae in water
rock pieces from bedrock
water and wind currents

Explanation:

Soil parent material is the underlying geological material (such as bedrock) in the area. Through processes like weathering (both chemical and biological as described in the text), rocks break down. Chemical weathering alters minerals in rocks by water and gases, and biological weathering, driven by organisms, accelerates rock breakdown. These processes turn rock pieces from bedrock into smaller particles that form the basis of soil parent material. Bacteria and algae in water are more related to biological processes in water ecosystems rather than being the main source of soil parent material. Water and wind currents are agents of erosion and transportation but not the source of the parent material itself.

Answer:

rock pieces from bedrock