Concept:The labelled structure is a type of sensory hair found around the nose and face.Explanation:The structure labelled I is a vibrissa, commonly called a whisker or tactile hair.It is found near the nose and mouth of animals such as rats and cats.Vibrissae are highly sensitive to touch and help the animal detect nearby objects and movements.They are therefore tactile sensory structures, not sensitive to light, radiation, or chemicals.Answer:D. tactile
