I think the correct answer is crust. I am really sorry if I am wrong.
They're covered by sedimentary rock .
Hope this helps :) !!
Rocks are broken down into smaller pieces by the process of weathering and erosion.
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ABC respectively
Hope it helps!
Answer:
C
Explanation:
A and D just doesn't make sense, B is wrong because they have tourists that may spread diseases, so it should be C.
Let me know if you got it right.
