Answer: The sentence that explains what "matter" is: (A) Matter is anything that has mass and takes up space.
Step-by-step explanation:
In science, the term "matter" refers to anything that has mass and takes up space. This definition highlights the two key characteristics of the matter: it has mass, meaning it has weight and can be felt through gravitational forces, and it takes up space, meaning it occupies a specific volume and can be felt through physical contact with other objects. This definition is an essential concept in the understanding of physical and chemical changes, as the matter is capable of undergoing changes and being transformed from one form to another.