Question

question 4 of 5
which statement describes the first step in soil formation?
a. bedrock becomes weathered.
b. sediment is carried by water.
c. humus forms topsoil.
d. decaying plants add nutrients.

Explanation:

Soil formation starts with the weathering of bedrock. Weathering breaks down the bedrock into smaller particles. Sediment being carried by water (Option B) is a later stage in the process of soil formation when materials are transported. Humus forming topsoil (Option C) and decaying plants adding nutrients (Option D) occur after the initial breakdown of bedrock as organic matter accumulates and interacts with the weathered rock particles.

Answer:

A. Bedrock becomes weathered.