Question

sample response: an element is considered a pure substance because it is made up of only one type of atom and cannot be broken down into a simpler form.
what did you include in your response? check all that apply.
an element is made up of only one type of atom.
an element cannot be broken down into a simpler form.

Explanation:

The sample response clearly states that an element is a pure substance because it is made of only one type of atom and cannot be broken down. Both options in the question directly match these key points from the sample.

Answer:

An element is made up of only one type of atom.
An element cannot be broken down into a simpler form.