Being Exposed to Radiation. Also, being exposed to harmful Toxins.
What’s the question?? You never finished asking your question!
A. A UNIT OF ENERGY SUPPLIED BY FOOD.
A calorie is a unit of energy. Historically, scientists have defined "calorie" to mean a unit of energy or heat that could come from a variety of sources, such as coal or gas. In a nutritional sense, all types of food — whether they are fats, proteins, carbohydrates or sugars — are important sources of calories, which people need to live and function.
The answer to this question is Personal taste.
As every one has his or her own love for food and a difference in their taste they would obviously take the most time in selecting a dish or the ingredients to prepare a dish that suits their taste buds.
Whether those ingredients are a little far away they will go and buy them so that the food they eat should please them.