Question

The most concentrated source of calories comes from

Answer 1

Fatty foods, such as fast-food meals, are the most concentrated source of calories due to their high-fat content.

Step-by-step explanation:

Fatty foods, such as those high in fat like fast-food meals, are the most concentrated source of calories. Fat is energy-dense, containing 9 calories per gram, while protein and carbohydrates only contain 4 calories per gram. This means that even if fast-food meals don't appear to be particularly large, they can still have a high-calorie content due to their fat content. For example, a meal high in fat like a burger and fries can contribute to the high energy density of the meal.

Answer 2

Carbohydrates.
The most concentrated source of calories comes from carbohydrates. Carbohydrates has three types: monosaccharide, disaccharide and polysaccharide. These carbohydrates are from the combined atoms of carbon that is one of the most important source of energy for an organism. In most animals, carbohydrates are modified to become glucose or blood sugar by the digestive system and delivered to many cells in the organisms’ body that is used in many cellular activity.