Q: What is the most complex organ in the human body?


Read this paragraph and choose the correct option from the provided answers:

The human brain is an amazing organ. It is the most complex organ in the human body. By adulthood, the brain weighs about 3 pounds and consists of billions of neurons. All those cells need a lot of energy. In fact, the adult brain uses almost a quarter of the total energy used by the body!.

 Choices:

- heart

- liver

- muscular

- brain


A:
brain