The very top layer of Earth is the crust, which is relatively quite thin when compared to the other layers of Earth. Which of these best describes the composition of Earth's crust?
A.) Liquid
B.) Metallic
C.) Gaseous
D.) Rocky

D.) Rocky

Explanation:

The crust is the top layer of the Earth which is relatively thin in comparison to other layers. The upper layer of Earth is called lithosphere.

The crust is composed of variety of rocks such as metamorphic, igneous, and sedimentary rocks. Below the crust, is the mantle which is also composed of rocks but also have semi-solid magma.

Hence, the correct answer is "D.) Rocky".

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