Breakfast cereal, or just cereal, is something typically eaten for breakfast.There are various brands and types. And "corn flakes" are simply just one type of cereal. Cereals: http://www.seriouseats.com/assets_c/2014/03/20110812-cereal-body-2-thumb-625xauto-387630.jpg Corn flakes: http://www.kelloggs.com.au/content/dam/workarea/assetpushqueue/assetpushqueue-WebAssets-Approved/images/web-raw-Approved/eng%20AU/81/28/prod_img-198128.jpg.thumb.319.319.png

"Corn Flakes "are one specific kind of cereal but "breakfast cereals" include all types of possible cereal that is available in the store to eat for breakfast