Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: MyPyramid can help you choose foods wisely for good health. Each colored band represents a different food group. The key shows which food group each color represents. Which colored band of MyPyramid is widest? Which food group does it represent?. Answer: food groups
A:
Mypyramid features colored bands that represent what?