- Carotene is a pigment that gives yellow-orange color to various fruits and vegetables, including peppers.
- Betanin is the pigment responsible for the red/purple color in beets, not cactus pear.
- Lycopene is the pigment responsible for the red color in tomatoes, not red beets.
- Flavanols are a type of flavonoid, and they are not typically associated with the orange color of cauliflower.
Final Answer:
\[
\boxed{\text{Carotene - Yellow-orange - Peppers}}.
\]