Question

1 which of the following is a known layer of earth? inner core inner surface middle core outer mantle skip 0/49 complete

Explanation:

The Earth has well - known layers such as the inner core, outer core, mantle (which has an upper and lower part but not an "outer mantle" in the standard terminology), and crust. There is no "inner surface" or "middle core" as recognized Earth layers. The inner core is a solid sphere at the center of the Earth.

Answer:

A. Inner core