Which of the following styles is typically characterized by a cloudy appearance and a fruity flavor?

Hefeweizen is a style of beer that is well-known for its cloudy appearance and fruity flavors. The cloudiness in Hefeweizen comes from the high percentage of wheat used in the brewing process, which does not completely settle during fermentation. This results in a hazy look that is characteristic of the style. Additionally, Hefeweizens often exhibit distinct fruity and spicy notes due to the specific yeast strains used, particularly the banana and clove flavors that are commonly associated with this style.

The other styles listed, such as Amber Ale, Porter, and Stout, typically do not possess the same fruity characteristics or cloudy appearance. Amber Ales are usually clearer and have a more malt-forward profile, while Porters and Stouts are darker, more robust, and focus on roasted flavors than fruitiness.