Question

what is matter? only the things we can see with our eyes. anything that has mass and takes up space. only liquids and solids. the things that are important to us like happiness.

Explanation:

In science, matter is defined as anything that has mass and occupies space. This includes solids, liquids, gases, and plasma. It doesn't have to be visible to the eye, and concepts like happiness are not matter as they have no mass or spatial - occupancy.

Answer:

Anything that has mass and takes up space.