Which statement correctly describes why a compound is a pure substance?

A compound is not a pure substance because each of its molecules is made up of the atoms of two or more different elements.

A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.

A compound is not a pure substance because it is not an element, and only elements are pure substances.

A compound is a pure substance because it consists of two different elements, which are pure substances.

Explanation:

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .