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What is the primary ingredient in the decomposition layer of the ecocolumn? A. humus B. mostly gaseous carbon dioxide C. only rocks D. mostly pebbles
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What is the primary ingredient in the decomposition layer of the ecocolumn?

A. humus
B. mostly gaseous carbon dioxide
C. only rocks
D. mostly pebbles

User Youddh
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1 Answer

3 votes
Respuesta:
A (Humus).
User Erasmortg
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