Final answer:
Oleic acid is a compound, matter, and not an isotope or element.
Step-by-step explanation:
Oleic acid is a compound because it is made up of two or more different types of atoms (carbon, hydrogen, and oxygen). It is not an isotope because it does not represent a variation of an element with a different number of neutrons. It is also not an element because it is composed of multiple atoms bonded together. Oleic acid is definitely matter because it has mass and occupies space.