Who decided what "Breakfast food is"?

Cold cereal, hot oatmeal, cream of wheat ,pancakes ,waffles,eggs bacon, sausage, toast and jelly sausage& biscuit. coffee and orange juice why are these breakfast foods and why don't we have hamburgers and french fries hot soups or a stew instead how about pizza? at all the restaurants and fast food it is always the same~ .. What makes a breakfast food ..a breakfast food?