Define calories and how the body gets energy

A calorie is a unit of energy. In nutrition, calories refer to the energy people get from the food and drink they consume, and the energy they use in physical activity. Calories are listed in the nutritional information on all food packaging. Many weight loss programs center around reducing the intake of calories.

This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids  in the stomach. When the stomach digests food, the carbohydrate  in the food breaks down into another type of sugar, called glucose. Calories are ENERGY that fuel our bodies; much like gasoline fuels our cars.

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answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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