The answer is D. Onion.
Sesame, corn, and olive are all seeds. Onion is a vegetable.
Sesame seeds are small, round seeds that come from the sesame plant. They are often used in cooking, and they are also a good source of protein and fiber.
Corn is a type of grass that is grown for its kernels. The kernels are used to make cornmeal, corn flour, and cornstarch. Corn is also a good source of carbohydrates, protein, and fiber.
Olives are small, green or black fruits that grow on olive trees. They are often used in cooking, and they are also a good source of monounsaturated fat, vitamin E, and antioxidants.
Onion is a vegetable that is grown underground. It has a strong smell and taste, and it is often used in cooking. Onions are a good source of vitamins C and K, as well as fiber.