* All living things are made of cells. This is one of the fundamental principles of biology.

* Some living things are made of only one cell. These are called unicellular organisms (think bacteria, amoebas, yeast).

* Other living things are made of many cells. These are called multicellular organisms (like plants, animals, and fungi).

So, the answer is both! All living things are made of cells, but they can be either single-celled or multicellular.