Name the source of cyclosporin-A. How does this bioactive molecule function in our body?

Explanation

### Step-by-Step Solution:

1. **Identify the Source of Cyclosporin-A:**
- Cyclosporin-A is produced by the fungus **Trichoderma polysporum**.

2. **Function of Cyclosporin-A in the Body:**
- Cyclosporin-A acts as an **immunosuppressant**. This means that it suppresses the immune system's activity.
- By suppressing the immune response, cyclosporin-A helps prevent the body from rejecting transplanted organs and tissues that are not originally from the individual.
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