James is a four year old boy and his mother described his eating as having little variety. For example, he will only eat cereal and milk for breakfast, peanut butter and jelly sandwiches or macaroni and cheese for lunch. He never chooses fruit that his mother offers him and he refuses to eat any vegetables. List one nutrient that James is missing from his diet. What suggestions do you have to help his mother get him to add this nutrients in James’ diet and get him to eat a larger variety of foods?