Carrots are orange because of a pigment called beta-carotene. Beta-carotene is a natural compound that gives carrots their vibrant orange color. 

Plants produce pigments like beta-carotene to help with various functions. In the case of carrots, beta-carotene plays a role in photosynthesis, which is how plants make food using sunlight. It also serves as a protective mechanism against the damaging effects of sunlight.

When we eat carrots, our bodies can convert the beta-carotene into vitamin A, which is an essential nutrient for our vision, immune system, and overall health. So, not only do carrots get their orange color from beta-carotene, but they also provide us with an important nutrient.

It's worth noting that while most carrots are orange, there are also other varieties of carrots that come in different colors such as purple, yellow, and white. These carrots contain different pigments, but the orange ones are the most common and well-known.
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