Roots and Foods
Roots are an essential part of a plant's anatomy, and they play a crucial role in the growth and development of a plant. Apart from providing support, roots also absorb water and nutrients from the soil, which the plant uses for its growth and survival. Many plants also store food in their roots, which we can consume as a part of our diet.

Foods from Roots
Out of the given options, only one food item is obtained from the roots of a plant, and that is a carrot. Carrots are root vegetables that belong to the family Apiaceae. They are grown for their edible taproots, which are rich in nutrients like vitamin A, vitamin K, and potassium. Carrots are consumed raw or cooked and are used in various dishes like salads, soups, stews, and curries.

Other Foods from Plants
Although oranges, potatoes, and bananas are not obtained from the roots of a plant, they are still important food items that we consume daily. Oranges are citrus fruits that are rich in vitamin C and fiber. Potatoes, on the other hand, are tubers that grow underground and are rich in carbohydrates, potassium, and vitamin C. Bananas are a type of fruit that grow on trees and are an excellent source of potassium, vitamin C, and dietary fiber.

Conclusion
In conclusion, roots are an essential part of a plant, and they play a crucial role in the growth and development of a plant. Carrots are the only food item out of the given options that we get from the roots of a plant. However, other food items like oranges, potatoes, and bananas are also important and provide us with essential nutrients.