Which hormone controls osmoregulation?

Explanation

**Step-by-Step Solution:**

1. **Understanding Osmoregulation**: Osmoregulation refers to the process by which the body maintains the balance of fluids and salts. This is crucial for the proper functioning of cells and overall homeostasis.

2. **Identifying the Hormone**: The hormone responsible for regulating osmoregulation is known as Antidiuretic Hormone (ADH).

3. **Source of ADH**: ADH is produced in the hypothalamus, a part of the brain that plays a key role in many bodily functions, including the regulation of water balance.

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