Answered

How does the C horizon form?
A) Rainwater washed clay and minerals from the A horizon to the C horizon
B) Plant roots weather pieces of rock
C) Plants add organic material to the soil.
D) Bedrock weathers and rock breaks up into soil particles



Answer :

SmokingHysteria
i am pretty sure that D is the answer. if not, then A.
I would say A because it is caused by erroded minerals.

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