The correct answer is D. Copper
Step-by-step explanation:
In chemistry, a substance refers to a homogenous matter with defined properties. Due to this, substances include pure elements and chemical compounds that combine different pure elements but form homogenous substances. According to this, from the options given the substance is copper, because this is a pure element, and this means it is composed of the same kind of atoms and therefore it has a regular or homogenous composition as well as defined properties. Also, others such as fruit punch, copper or amber gemstones are the result of different elements and er not homogeneous.