Pick a grocery store, and take notes on how the store is set up, and what factors you see affecting common food selections by the public.

Explanation:

I would pick up the Hyper Panda Grocery Store. This is a hyper market in which all grocery items, which you name, are available. There are sections of foods like dairy products, juices, meats, cereals, can items, flour rice wheat, breakfast items, vegetables, fruits, and a lot more. This was the market which was started on the large scale and is running successfully in town. I see many factors that affect the selection of common food by the public. This may include the availability and ease of finding the grocery items at one place. When people come to buy one product, they may recall other items as well and just buy those items also from the store. There are also some common foods like beverages and fresh juices whose sales are affected by the weather conditions. Public tend to buy more of such products in the hot weather. On the broader view, the income of the public definitely affect their choices of selecting the common food items. More the income, more the buying of items from the store and vice versa.

example of simple carbohydrates:

examples of complex carbohydrates: