system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are certain foods considered breakfast foods?

Is there anything particular about eggs/pancakes/cereal/oatmeal that make them considered breakfast foods? Is it because they are simple to prepare and high in protein or calories to keep you fueled?
gpt
Every culture has foods that they start to eat for breakfast. After a while they become the traditional breakfast option for that culture. American breakfast evolved from our Agrarian lifestyle where farmers and ranchers needed high caloric intake but had little free time. They had large breakfasts, little to no lunch, and medium to large suppers.