Which part of the brain is involved in executive functions?

The frontal lobe is the correct answer because it is primarily responsible for executive functions, which include higher-level cognitive processes such as decision-making, problem-solving, planning, impulse control, and social behavior. The frontal lobe plays a crucial role in organizing information and managing tasks that require attention and reasoning. It allows individuals to navigate complex situations and make informed choices, which is why it is often referred to as the brain's command center.

In contrast, the hippocampus is primarily involved in memory formation and spatial navigation, and while it plays a role in learning, it does not directly manage executive function tasks. The motor cortex is focused on the planning and execution of voluntary movements, and while it is essential for motor functions, it does not handle the cognitive aspects of decision-making or problem-solving. The association areas, which are located throughout the cerebral cortex, integrate sensory input and contribute to cognitive functions but are not as directly linked to executive functions as the frontal lobe is. Therefore, the frontal lobe is uniquely positioned as the epicenter of executive functions, making it the correct answer.