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zlopas [31]
3 years ago
14

Need help ASAP

Biology
2 answers:
levacccp [35]3 years ago
7 0

Answer:

b. silica

Explanation:

Olegator [25]3 years ago
4 0

!!

Explanation:

A crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust.

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