What characteristic of beer helps it to refresh the palate with sweet desserts?

The correct answer highlights the role of alcohol intensity in refreshing the palate when pairing beer with sweet desserts. Beers with higher alcohol content can have a warming effect, which contrasts nicely with the sweetness of desserts. This effect can enhance the overall tasting experience by cutting through the richness and toning down the sweetness, providing balance.

In contrast, options such as low carbonation may not effectively cleanse the palate the way alcohol does, as lower carbonation can leave a heavier feeling on the mouth. High sweetness in a beer could amplify the sweetness of desserts rather than providing a refreshing contrast. Fruitiness can certainly complement desserts, but it does not necessarily have the same palate-cleansing property that alcohol intensity can offer.

Thus, the characteristic of alcohol intensity is particularly effective in creating a refreshing experience when enjoying sweet treats alongside beer, making it a key aspect of the pairing dynamic.