Breads and other whole grain foods are composed of very large polysaccharide molecules which contain hydrogen, oxygen, and which other element?
a) carbon
b) iron
c) nitrogen
d) water

The correct answer is A. Carbon. That's why things like breads and other whole grain foods, including all types of pasta, are called carbohydrates. They are a great source of quick energy but one should not eat a lot of them because they can make you obese if you're not careful. Chocolate and other sweets are also great sources of carbohydrates.

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