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Answer
Hi,
A bedrock can be described by {a} consist of solid rock and {b} lies below the soil layer
Explanation
Bedrock is that rock which lies directly under soil and gravel. Geologically, this is the lithified rock laying under the regolith. It can also underlie other sediments on the ocean floor. Being a consolidated rock, it is solid and tightly bound.
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A)consists of solid rock
B)lies below the soil layer
E)is the source of mineral fragments that make up soil