Which type of weather advisory would be used for advising on the risk of icing during flight?

The correct choice focuses on Airmet Zulu, which is specifically issued to inform pilots about the potential for icing conditions. Icing occurs when an aircraft flies through supercooled liquid water droplets, which can lead to dangerous conditions if not managed appropriately. Airmet Zulu alerts pilots to conditions of moderate or severe icing, helping them make informed decisions to avoid such conditions during their flight.

In contrast, the other options refer to different weather phenomena. Airmet Tango pertains to turbulence, Airmet Sierra warns of IFR conditions primarily caused by reduced visibility or low clouds, and Airmet Foxtrot deals with gusty winds and/or turbulence in a general sense. Understanding the purpose of each Airmet helps pilots navigate safely by responding to specific weather threats appropriately.