Which anti-ice switch is indicated as being ON according to the ECAM bleed page?

The anti-ice status displayed on the ECAM bleed page indicates which anti-ice systems are currently activated. In the case of the A320, when the WING anti-ice switch is shown as being ON, it means that the wing anti-ice system is engaged to prevent ice accumulation on the wings, which is crucial during flight operations in icing conditions.

The reason the WING choice is recognized as the correct answer relates to the specific functionality of the cockpit indicators. The ECAM system provides real-time status updates for various airplane systems, and when the WING anti-ice is engaged, it is clearly indicated on the bleed page. This is essential for pilots to understand which parts of the aircraft are being protected from ice buildup, as inadequate ice protection can lead to dangerous flight conditions.

The other options refer to the engines, and while they are equally important for anti-ice operations, they do not pertain to the indicator shown for the WING anti-ice system in this context. Hence, only the WING setting being ON is directly relevant to the question about the ECAM bleed page display.