What is an important task regarding ice during the flight?

The correct choice highlights the importance of handling ice properly during a flight to maintain hygiene and safety protocols. Placing ice in a separate bag on top of the trash inside the waste cart ensures that it does not come into contact with waste or any unsanitary materials, which could contaminate it. This method of storage not only prevents cross-contamination but also allows for easy disposal of the ice once it is no longer needed, minimizing the risk of spills or messes during service.

In contrast, keeping ice on the beverage cart at all times can lead to contamination if proper care isn’t taken, as it is in close contact with drinks and can become soiled. Storing ice in a refrigerator isn't appropriate during the flight as it is typically served directly to passengers and needs to be easily accessible. Distributing ice to passengers as needed is essential as part of beverage service but does not address the crucial aspect of safe storage and hygiene, which is correctly highlighted in the chosen option.