Final answer:
The frontal lobe is the part of the brain that oversees motor functions, including the conscious decision to produce body movements, as it contains the motor cortex responsible for planning and executing movement.
Step-by-step explanation:
The lobe of the brain that contains motor areas, allowing a person to consciously decide to produce body movements, is the frontal lobe. The frontal lobe, located at the front of the brain, is involved in various functions including motor control, decision-making, and language. The motor cortex, which is a part of the frontal lobe, plays a significant role in planning, coordinating and executing movement. Neurons within the motor cortex map to different muscle groups and are responsible for sending commands for muscle movements to the spinal cord and periphery. Moreover, the frontal lobe encompasses the prefrontal cortex, which is associated with higher-level cognitive functions and aspects of personality affecting motor responses in decision-making.