Question

use the drop-down menus to select the names of the labeled structures. a: b: c: mantle core crust

Explanation:

Step1: Identify Structure A

Structure A is the outermost layer of the Earth's cross - section shown, which is the crust. So for A, we select "crust".

Step2: Identify Structure B

Structure B is the layer between the crust and the core, which is the mantle. So for B, we select "mantle".

Step3: Identify Structure C

Structure C is the innermost layer of the Earth's cross - section, which is the core. So for C, we select "core".

Answer:

A: crust
B: mantle
C: core