Which of the following statements about flavonoids is true?

Flavonoids are a diverse group of plant compounds that are indeed known for their role in the coloration of various fruits and vegetables. This is largely due to their ability to absorb light at different wavelengths, resulting in the wide variety of colors seen in plant foods, ranging from red and blue to purples and yellows. Their contribution to color is not only important for aesthetics but also plays a role in attracting pollinators and seed dispersers, thus aiding in plant reproduction.

In relation to the other statements, flavonoids are not classified as fat-soluble pigments; they are typically soluble in water and contribute to the soluble fraction in fruits and vegetables. The assertion that they are primarily found in starches is misleading, as flavonoids are found primarily in fruits, vegetables, and beverages like tea, rather than in starch-rich foods. Thus, the emphasis on their contribution to the visual aspects of produce solidifies the accuracy of the correct choice.