What is the main thinking part of the brain?

The main thinking part of the brain is the forebrain, which is responsible for many complex functions such as thinking, perception, sensation, and voluntary movement. It includes the cerebral cortex, which is the outermost layer of the brain, and is responsible for consciousness, thought, and memory.

The midbrain and hindbrain are important for many other functions, such as balance and coordination, and the processing of sensory information, but they are not typically thought of as the main thinking part of the brain. The central brain is not a commonly used term in neuroscience and is not typically associated with any specific function.