Particles that can be classified by their properties make up matter.

Here's why:

* Matter is anything that has mass and takes up space.

* Properties of matter include things like:

* Physical properties: Color, texture, density, melting point, boiling point, etc.

* Chemical properties: Reactivity, flammability, acidity, etc.

By classifying particles based on their properties, we can understand and organize the vast diversity of matter in the universe.