What is whole food?
The short answer is this. Whole foods are the type of food that remain as close as possible to the way they were made in nature without processing, additives or refinements.
Going deeper into that answer is very revealing.
Canning, bottling and putting foods in the box are examples of processing. Some additives you may think of are salt, sugar and colors. However, vitamins and mineral enrichment is adding additives. Removing the hull from grain is refinement as is extracting whey from milk.