Question

as labeled in this diagram, which layer contains all naturally occurring elements from the periodic table? a b c d

Explanation:

The Earth's layers: A is the inner core (composed mostly of iron and nickel), C is the outer core (also iron-nickel dominated), B is the mantle (rich in silicate minerals but not all natural elements). D is the crust, which is the outermost layer where all naturally occurring elements from the periodic table are found, as it is the most chemically diverse layer hosting a wide range of rocks, minerals, and compounds that contain every natural element.

Answer:

D. The outermost layer (labeled D, the crust)