While you are at the store you see a young child climb onto a motorcycle arcade game and the child eagerly begins to press the acceleration and attempts to steer the motorcycle. at first the child thinks they are in control but as the seconds pass and they realize that they are just watching the game demo. which brain region the child detect the discrepancy between what they were doing and what the motorcycle on the screen was doing

Inferior Parietal Cortex.

Explanation:

Inferior parietal cortex lies horizontally on  intraparietal sulcus and lower part on the central sulcus. Inferior parietal lobule is also known as Geschwind’s territory.

This area of brain is mainly involved in the perception of emotion in the facial stimuli and the sensory information interpretation. Inferior Parietal Cortex is involved in the body image, language, mathematical operation and information sensing. This area of brain is also involved to distinguish between the discrepancy.

Thus, the correct answer is inferior parietal cortex.