Explain and elaborate specifically in details in terms of both food

retailer and retailer consumers needs and behaviour of working adults, tertiary and universities students, housewife, and families.
-Why food retailer setting up and selling their foods and services at your own physical stores or brick and mortar stores?
-Why food retailer selling their foods through their own hotline number?
-Why food retailer selling their foods through their own mobile applications and own company website?
-Why food retailer selling their foods through Third party food delivery companies
(e.g. GrabFood, FoodPanda, Delivervoo, Honestbees)?
-Why food retailer selling their foods through vending machine?