What are viviparous animals? Name non-mammal viviparous animals.

Explanation

**Step-by-Step Solution:**

1. **Definition of Viviparous Animals**:
- Viviparous animals are those that give birth to live young ones rather than laying eggs. This means that the young develop inside the body of the mother and are born fully formed.

2. **Comparison with Oviparous Animals**:
- In contrast, oviparous animals lay eggs, which then hatch outside the mother's body. This distinction is important in understanding the reproductive strategies of different animal groups.

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