Which area of the brain is known to control all voluntary activities of the body?

The cerebrum is the largest part of the brain and is primarily responsible for controlling all voluntary activities of the body. This region is involved in a wide range of functions including movement, sensory processing, reasoning, problem-solving, and emotional regulation. Specifically, the motor cortex located in the cerebrum plays a critical role in planning, controlling, and executing voluntary movements. This makes it essential for any conscious actions, such as walking, talking, or writing.

In contrast, the cerebellum, while important for coordination and balance, does not control voluntary activities directly. The hypothalamus regulates autonomic functions and maintains homeostasis but does not initiate voluntary movements. The limbic system is associated with emotions and memory rather than the direct control of voluntary muscle activity. Therefore, the cerebrum's role as the command center for voluntary actions solidifies its position as the correct answer.