Why do living organisms require food?

Explanation

### Step-by-Step Solution:

1. **Energy Provision**: Living organisms require food primarily because it provides energy. This energy is essential for performing daily activities such as moving, working, and even thinking.

2. **Growth and Development**: Food is crucial for the growth and development of living organisms. It helps in the maturation of cells and supports the division of cells, which is necessary for growth.

3. **Protection Against Diseases**: Food plays a significant role in protecting the body from diseases. It helps in the production of white blood cells (WBCs) that fight against foreign organisms, such as bacteria and viruses, which can cause illness.

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