Final answer:
The left frontal lobe is responsible for speech production, which is supported by the existence of Broca's area. Broca's area is predominantly located in the left hemisphere of the brain.
Step-by-step explanation:
The left frontal lobe is responsible for speech production. This is supported by the existence of Broca's area, a region in the frontal lobe that is associated with the motor commands necessary for speech production. Broca's area is predominantly located in the left hemisphere of the brain, which is responsible for language production in approximately 95% of the population.