Answer: D. Matter is the stuff of the universe.
Explanation: Matter is the physical substance that makes up everything in the universe. It includes solids, liquids, and gases. Matter is anything that takes up space and has mass.
Contrary to the statement that matter doesn't exist, matter is actually all around us. For example, the chair you sit on, the water you drink, and the air you breathe are all forms of matter. Even the tiniest particles, like atoms and molecules, are considered matter.
Matter is not the same as energy. While matter has mass and occupies space, energy is the ability to do work or cause change. They are related but distinct concepts.