How does the C horizon form?

Rainwater washes clay minerals from the A horizon to the C horizon
Plant roots weather pieces of rock
plants add organic material to the soil
bedrock weathers, and breaks up into soil particles.**

What makes up soil besides rock particles, minerals, air, and water?
Color and chemistry
texture and pore space
decayed organic matter**
oil

A geologist is studying a layer of soil in the Sahara. The soil layer contains little humus but a lot of clay and other rock particles. Which soil layer is it?
A horizon
B horizon**
C horizon
bedrock

3 answers

I think your answers are correct.
what is the answer?
The answer is A.
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