Multiple choice

The rigid outer layer of Earth that consists of the crust and upper mantle is called?

  1. lithosphere

  2. asthenosphere

  3. outer core

  4. transition zone

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A Correct answer
Explanation

The lithosphere is the cool, rigid outermost shell of Earth, encompassing the crust and the uppermost portion of the mantle. Below it lies the asthenosphere, which is a hotter, weaker, and more ductile layer of the mantle.