What safety action is taken regarding the carb heat during a power-off stall?

In the context of a power-off stall, the correct action regarding carburetor heat is to keep it on until recovery. This is because using carburetor heat helps to prevent ice formation in the carburetor, which can occur during reduced power settings and is particularly critical during maneuvers like stalls.

When carburetor heat is applied, it warms the air entering the engine, which helps to ensure that fuel vaporizes more efficiently and minimizes the risk of the engine stalling due to ice in the carburetor. During a power-off stall, which is characterized by low airspeed and a pronounced angle of attack, it is essential to maintain proper engine performance to facilitate recovery. Therefore, keeping the carb heat on until recovery not only enhances engine performance but also contributes to a safer recovery from the stall.

In contrast, other choices do not correctly prioritize engine safety or performance during such critical flight maneuvers. For instance, disregarding carb heat or turning it off would expose the engine to ice formation risks, particularly in colder and moist conditions.