need similar food. have the same life span. live in the same climate. are made of cells.
I gave my students this multiple choice question: A characteristic that all living organisms have in common is they

Only one answer is correct among these 4 choices:
- need similar food.
- have the same life span.
- live in the same climate.
- are made of cells.

Could you tell me which one is correct?

are made of cells.