Which of the following best describes a complex carbohydrate?

The description of a complex carbohydrate as a rich source of fiber that takes longer to digest is accurate because complex carbohydrates, which include foods like whole grains, legumes, and vegetables, are composed of long chains of sugar molecules. This structure requires more time to break down during digestion, providing a steady release of energy over a longer period compared to simple carbohydrates, which can lead to quick spikes in blood sugar and subsequent dips. The fiber found in complex carbohydrates also contributes to digestive health, helping to regulate blood sugar levels and promote a feeling of fullness, which can be beneficial for weight management.

In contrast, simple sugars, which consist of one or two sugar molecules, are quickly absorbed by the body, leading to rapid energy release which does not sustain energy levels for long. Likewise, quick energy sources are typically associated with simple carbohydrates, which can be detrimental to energy stability. Lastly, a high-fat content is not a characteristic of complex carbohydrates; instead, it pertains to different food categories, such as oils and fatty foods. Therefore, the focus on fiber and slower digestion encapsulates the unique qualities of complex carbohydrates effectively.