The process by which a substance absorbs moisture upon exposure to atmosphere is called:

A. Desalination
B. Efflorescence
C. Both A & B
D. Deliquescence 

🧠 Explanation:

Deliquescence is the process where a substance absorbs atmospheric moisture, turning liquid. This chemical property is a key topic in chemistry, engaging students and scientists. Understanding deliquescence clarifies material behavior, relevant for industrial and environmental studies. Its unique nature attracts those exploring chemical processes, highlighting its role in storage and manufacturing, emphasizing its importance in managing moisture-sensitive substances in labs and industries for practical applications.