A. Sand
B. Silt
C. Gravel
D. Rock
Correct Answer: Option D
D. Rock
Explanation
Parent materials are the weathered rock or sediment from which the soil was formed.
A. Sand
B. Silt
C. Gravel
D. Rock
Correct Answer: Option D
D. Rock
Explanation
Parent materials are the weathered rock or sediment from which the soil was formed.
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