In some regions, particular plant foods are emphasized. As a specific example, potatoes are traditionally a major part of the diet in Ireland, Norway, and Lithuania. What does the ecological setting have to do with this food-eating custom? Solution Ecological environment decides the food eating customs of people in that area. The food taken by people daily, depends on the type of weather in that area. Places that are colder, people tend to eat things with warm in metabolism, there. Places that are hot, people eat such food items there, which can provide them relief from excess heat. Potato is a rich source of carbohydrate and is warm food that provides heat to the body in its metabolism, so Ireland Norway Luthiania being colder places, people opt to eat potato to maintain their body temperature. The same way, In India nothern part is very cold, so people eat lot of dry fruits, rajma, chana, meat, bajra and wheat in their diet. Such foods provide them warmth. In southern part of India, there is hot temperature most of the year, so people there eat rice as main food, coconut water, Vegetable stock like Rasam are included in food. Such foods provides them relief from heat..