Starving person will first use :

Options

A. fats
B. glycogen
C. blood protein
D. muscle protein

Answer

To answer the question "Starving person will first use:", we need to understand the biological processes involved in energy utilization by the human body during starvation.

### Step-by-Step Solution:

1. **Understanding Energy Sources**: The human body requires energy to function, which it derives from various biomolecules. The primary sources of energy are carbohydrates, fats, and proteins.

2. **Energy Utilization During Starvation**: When a person is starving, the body goes through a series of metabolic changes to utilize its stored energy. Initially, the body will utilize the most readily available source of energy.

3. **Glycogen Stores**: The first source of energy that the body taps into during starvation is glycogen, which is stored in the liver and muscles. Glycogen can be quickly converted into glucose, which is used for energy.

4. **Fat Stores**: Once glycogen stores are depleted, the body will begin to break down fat stores (triglycerides) into fatty acids and glycerol for energy.

5. **Protein Utilization**: If starvation continues and fat stores are also depleted, the body will start to break down proteins (muscle tissue) to use amino acids for energy. This is a last resort as it can lead to muscle wasting.

6. **Conclusion**: Therefore, the first source of energy that a starving person will use is glycogen.

### Final Answer:
A starving person will first use glycogen stores for energy.