What feature often distinguishes a full-bodied wine?

A full-bodied wine is typically characterized by its weight and richness on the palate. This sensation of fullness is often the result of several factors, including a higher alcohol content, greater residual sugar, and a more substantial concentration of flavors and tannins. These elements combine to create a more viscous mouthfeel and a pronounced presence that fills the mouth, contributing to a luxurious drinking experience.

In terms of the other options, high acidity can contribute to the overall balance of the wine, but it doesn't inherently define a wine's body. A light color often corresponds to lighter-bodied wines, such as whites or lighter reds, which contrasts with the characteristics of full-bodied wines that usually display deeper hues. Low alcohol content also tends to be associated with lighter-bodied wines, while full-bodied wines often have higher alcohol levels, contributing to their richness. This context reinforces why the characteristic of weight and richness on the palate is a key distinguishing feature of full-bodied wines.