Whole food is food in its original form. Whole food has no unnecessary or additional ingredients. Whole food has not been processed, canned, altered or changed. To learn how to eat healthfully you need to understand the distinction between whole food and processed food and only buy and eat food that fits into the whole food category. The best whole foods are perfect just as they are, in their original state.
Also, and this is so important, do not buy anything with GMOs. Organic meats and chicken, eggs, etc., is the only way to be sure you are not eating animals that have been raised on a GMO diet.