Which leucocytes provide immunity?

Explanation

**Step-by-Step Solution:**

1. **Understanding Leukocytes**: Leukocytes, commonly known as white blood cells (WBCs), are crucial components of the immune system. They are colorless due to the absence of hemoglobin.

2. **Identifying the Type of Leukocyte**: Among the various types of leukocytes, lymphocytes are specifically known for their role in providing immunity.

3. **Types of Lymphocytes**: Lymphocytes can be categorized into two major forms:
- **B lymphocytes (B cells)**: These cells are primarily responsible for the production of antibodies, which help in identifying and neutralizing pathogens like bacteria and viruses.
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