C. Yes, rocks are valuable because they are part of Earth's crust.
D. Yes, rocks are valuable because they are useful to people.
Are rocks considered valuable natural resources?
A. No, rocks are not valuable because they are nonliving solids.
B. No rocks are not valuable because they contain a lot of waste
C. Yes rocks are valuable because they are part of Earth's crust
D. Yes rocks are valuable because they are useful to people
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