Which characteristic of beer is vital for cleansing the palate of fatty foods?

High carbonation is crucial for cleansing the palate of fatty foods because the bubbles and the overall effervescence help to lift and break down the oily compounds present in fatty dishes. The sensation of carbonation creates a refreshing effect that can cut through richness, allowing the flavors of the food to be experienced more fully after each sip.

In contrast, fruity esters can enhance complexity and flavor but do not necessarily contribute to palate cleansing. Low bitterness can provide a smoother taste experience but is not particularly effective at cutting through grease. High alcohol content can impart warmth and intensity but does not play a significant role in refreshing the palate in the way that carbonation does. Therefore, the ability of high carbonation to create a crisp and clean feeling while consuming fatty foods makes it the most effective characteristic for palate cleansing.