Question

which nutrient is the body’s main source of energy
a protein
b carbohydrates
c fat
d vitamins

Explanation:

To determine the body's main energy source, we analyze each option:

• Option A (Protein): Primarily for growth, repair, and enzyme/hormone production, not main energy source.
• Option B (Carbohydrates): Broken down into glucose, which cells use for immediate energy. Body prefers carbs for energy.
• Option C (Fat): Secondary energy source, stored for later use, not the main one.
• Option D (Vitamins): Regulate processes, not an energy source.

So, carbohydrates are the main energy source.

Answer:

B. Carbohydrates