unicellular. multicellular. part of a bacterial colony. able to function independently.
I gave my students this multiple choice question: The human brain is an organ that is made up of many tissues. This information can be used to determine that the brain is

Only one answer is correct among these 4 choices:
- unicellular.
- multicellular.
- part of a bacterial colony.
- able to function independently.

Could you tell me which one is correct?

multicellular.