Sugar is made of carbon, hydrogen, and oxygen atoms. Sugar is A a compound because its parts cannot be separated through physical means. B an element because it is a pure substance whose parts cannot be separated. C a mixture because it is made of different kinds of atoms. D a solution because it dissolves when mixed with water.

A a compound because its parts cannot be separated through physical means.

Explanation:

The sugar is a compound because its parts cannot be separated through physical means.

A compound is a substance composed of two or more kinds of atoms joined together in a definite grouping.

The properties of a compound are distinct from those of the elements that makes them up.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).