Write the full form of AIDS. Name the causative agent of AIDS.

Explanation

**Step-by-Step Solution:**

1. **Identify the Full Form of AIDS:**
- AIDS stands for Acquired Immunodeficiency Syndrome. This term indicates a condition where the immune system becomes significantly weakened, making the individual more susceptible to infections and diseases.

2. **Identify the Causative Agent of AIDS:**
- The causative agent of AIDS is the Human Immunodeficiency Virus (HIV). This virus is responsible for attacking the immune system, specifically targeting CD4 cells (T cells), which play a crucial role in the immune response.

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