Reflex actions are automatic, involuntary responses to stimuli

Steps:

• Recall that a reflex action is an involuntary, rapid response to a stimulus, bypassing conscious thought.
• Examine each option to check if it involves automatic protection without brain processing.
• Eliminate voluntary or learned actions that require decision-making.
• Select the option matching the reflex definition.

Why C is correct:

• Blinking is a reflex arc response, an involuntary action triggered by the corneal reflex to protect the eye from irritants, as defined in neurophysiology.

Why the others are wrong:

• A: Eating rice is a voluntary behavior to regulate blood glucose, not automatic.
• B: Lifting a book requires conscious muscle control and planning.
• D: Solving problems involves higher brain functions like reasoning, not reflexes.

Final answer: C