The main function of the brain is to serve as the control center for the body, processing and interpreting sensory information, coordinating movement, and regulating bodily functions. It is responsible for vital functions such as breathing, heart rate, and digestion, as well as higher cognitive processes like reasoning, problem-solving, and emotional regulation. The brain also plays a central role in learning and memory, shaping behavior and personality through neural connections. Its complex structure and intricate networks enable the brain to adapt and respond to various stimuli throughout a person's life.