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Which of the following is known to be the third and innermost structural shell of the earth?

7. Which of the following is known to be the third and innermost structural shell of the earth?

1. Mantle
2. Atmosphere
3. Crust
4. Core

Answer

The correct answer is: D) Core

Explanation

The Earth's structure is often separated into three layers: the crust, the mantle, and the core. The core is the Earth's innermost layer, which is separated into the outer core and the inner core.