Questions: Which is the correct order from least to greatest, of the amount of energy required to process food types? Carbohydrates < Proteins < Fats Carbohydrates < Fats < Proteins Fats < Carbohydrates < Proteins Proteins < Fats < Carbohydrates.

The answer is the second one: Carbohydrates < Fats < Proteins.

Explanation for each option:

1. Carbohydrates < Proteins < Fats: This is incorrect because proteins generally require more energy to process than fats.

2. Carbohydrates < Fats < Proteins: This is correct. Carbohydrates are the easiest to process, followed by fats, and proteins require the most energy to process.

3. Fats < Carbohydrates < Proteins: This is incorrect because carbohydrates are easier to process than fats.

4. Proteins < Fats < Carbohydrates: This is incorrect because proteins require the most energy to process, not the least.

Summary: The correct order from least to greatest, of the amount of energy required to process food types, is Carbohydrates < Fats < Proteins.