In which organ ammonia is converted to urea?

Explanation

**Step-by-Step Solution:**

1. **Understanding Ammonia Production**: Ammonia is a toxic byproduct of protein metabolism in the body. When proteins are broken down, ammonia is produced.

2. **Need for Conversion**: Since ammonia is toxic, it cannot be excreted directly. Therefore, it needs to be converted into a less harmful substance.

3. **Identifying the Organ**: The organ responsible for converting ammonia into urea is the liver.

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