In living organisms, an active immune system recruits many cells to the affected tissue to kill off the diseases causing microbes. This recruitment process is called

Options

A. syphilis
B. inflammation
C. encephalitis
D. SARS.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Immune System**: The immune system is a complex network of cells and proteins that defends the body against infection. When pathogens invade, the immune system responds by recruiting various immune cells to the site of infection.

2. **Identifying the Recruitment Process**: The process by which immune cells are recruited to the affected tissues in response to infection or injury is crucial for controlling the spread of disease.

3. **Recognizing the Signs of Immune Response**: During this recruitment, several signs such as swelling, redness, heat, and pain may occur at the site of infection. These are typical indicators of an immune response.

4. **Defining the Recruitment Process**: The specific term used to describe this recruitment process, where immune cells gather at the site of infection or injury, is known as "inflammation."

5. **Conclusion**: Therefore, the answer to the question is that the recruitment process of immune cells to affected tissues is called **inflammation**.

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