Neezing, coughing, and blinking are __ that help infants respond to the environment.

reflexes

Explanation:

Newborn infants have natural reflexes, which consist of involuntary movements that are a reaction to the environment.

Sneezing, coughing and blinking are reflexes that last until adulthood, which means infant does not stop preforming them at a certain age like with sucking, grasping or tonic neck reflex.

Coughing and sneezing are a reaction to the airway or nasal stimulation or irritation while blinking occurs when presented with bright light, touch, or sudden move.