Final answer:
The correct answer is C) Boiling, which is the process where bubbles containing dissolved air leaving the liquid are produced when water heats up and the pressure within the bubbles increases, allowing them to rise to the surface and escape.
Step-by-step explanation:
The process that produces bubbles containing dissolved air leaving the liquid is known as boiling. During boiling, water contains dissolved air and other impurities. As the liquid heats up, the water vapor and the air dissolved in it form bubbles. These bubbles expand due to the increase in water vapor pressure and eventually rise to the surface and escape into the atmosphere once the buoyant force overcomes the pressure of the liquid on top.
Alternative processes include evaporation, which occurs at temperatures below the boiling point and does not form bubbles, and effervescence, commonly observed when carbon dioxide leaves a carbonated liquid upon opening, forming fizzy bubbles. Sublimation, on the other hand, refers to the transition from a solid directly to a gas, bypassing the liquid stage entirely. Hence, the correct answer to the student's question is C) Boiling.