What is a key feature of wine glasses?

The correct answer highlights a fundamental design characteristic of wine glasses, which is the structure where the rim is narrower than the bowl. This design serves multiple purposes, particularly in the context of wine tasting.

A narrower rim helps to focus the aromas of the wine towards the nose, enhancing the sensory experience. When swirling the wine in the glass, the shape allows the wine to mix with air more easily, promoting the release of aromatic compounds. This is particularly important for red wines, which often have more complex aromas that benefit from this design.

While the other aspects mentioned, such as a wider bowl, thicker stem, and larger base, may appear relevant, they do not encapsulate the same primary functional significance when it comes to enhancing the drinking and tasting experience of wine. The focus of the design is to ensure that the appreciation of the wine's bouquet is optimized, which is why the narrower rim is key.