Concept:Antonyms are words with opposite meanings. Humidity refers to moisture in the air, so its antonym must mean a lack of moisture. Explanation:Humidity means dampness or wetness in the atmosphere.Dampness, moisture, and wetness all describe the presence of water or dampness.Dryness is the total absence of moisture, making it the direct opposite of humidity.Thus, among the given options, only Dryness fits as an antonym. Answer:Dryness (Option D)