What vitamin is carotene in green grass a good source of?

Carotene, specifically beta-carotene, is a pigment found in green plants and is particularly abundant in green grass. It is a precursor to vitamin A, meaning that the body can convert beta-carotene into vitamin A upon consumption. This conversion is crucial because vitamin A plays an essential role in various bodily functions, including vision, immune system support, and skin health. Grass-fed animals, such as cattle, obtain beta-carotene from their diet, which then contributes to their overall vitamin A levels. This is why the correct answer highlights the importance of carotene in providing vitamin A, linking the nutritional content of green grass directly to the health of the animals that consume it.