Which of the following involves heat transfer through gases?

Heat transfer through gases primarily occurs via convection. Convection is the process where warmer regions of a fluid (which can be a gas or liquid) rise while cooler regions sink, creating a circulating flow that transfers heat. For example, when air is heated, it rises and displaces cooler air, allowing heat to spread throughout the gas.

While conduction and radiation are also methods of heat transfer, they operate differently. Conduction involves the transfer of heat through direct contact between materials, typically more effective in solids than in gases. Radiation, on the other hand, involves the transfer of heat in the form of electromagnetic waves and does not require a medium, meaning it can occur in a vacuum. Since the question specifically asks about heat transfer through gases, convection is the most relevant mechanism.