the very thin layer at earths surface (shown as a thin brownigh layer in the diagram below) is called the…

the very thin layer at earths surface (shown as a thin brownigh layer in the diagram below) is called the crust. what layer is labeled directly below the crust in this diagram?
Answer
Brief Explanations:
The Earth's structure has the crust as the outermost layer, and directly beneath it is the mantle. The upper part of the mantle is shown in the diagram.
Answer:
Upper mantle