The structure that receives and processes information and regulates all bodily activity is the brain.

Here's why:

* Information Reception: The brain receives information from all over the body through the nervous system. This includes sensory information like sight, sound, touch, taste, and smell, as well as internal information about things like blood pressure and temperature.

* Information Processing: The brain analyzes this incoming information, compares it to past experiences, and makes decisions about how to respond.

* Regulation of Bodily Activity: The brain sends out signals through the nervous system to control everything from heart rate and breathing to muscle movement and hormone release.

While other organs play important roles in bodily function, the brain is the central control center that orchestrates and regulates all activity.