a single-celled organism. multiple organisms. an inorganic substance. a group of cells.
I gave my students this multiple choice question: A paramecium is an example of

Only one answer is correct among these 4 choices:
- a single-celled organism.
- multiple organisms.
- an inorganic substance.
- a group of cells.

Could you tell me which one is correct?

a single-celled organism.