Here's why:
* C horizon: This is the least weathered layer, directly above the bedrock. It consists of broken-up bedrock fragments with little to no organic matter.
* A horizon: This is the topsoil, rich in organic matter, and forms as the C horizon weathers further.
* B horizon: This is the subsoil, below the A horizon, and is characterized by accumulation of minerals from the A and C horizons.
The weathering process, which involves breaking down the bedrock, is the first step in soil formation, leading to the creation of the C horizon.
