Which is viviparous (give birth to young ones)?

Options

A. Kangaroo, Dolphin (Delphinus) flying fox (Pteropus), Blue whale
B. Lion, Bat, whale, ostrich
C. Platypus, Penguin, Bat
D. Shrew, bat, Cat, Corvus

Answer

### Step-by-Step Solution:

1. **Understanding Viviparous Animals**: Viviparous animals are those that give birth to live young ones instead of laying eggs. This is an important characteristic that distinguishes them from oviparous animals, which lay eggs.

2. **Analyzing the Options**: The question provides several options:
- Kangaroo
- Dolphin
- Flying Fox
- Blue Whale

3. **Identifying Viviparous Animals**:
- **Kangaroo**: Kangaroos are marsupials, which means they give birth to immature young that continue to develop in the mother's pouch. Therefore, kangaroos are viviparous.
- **Dolphin**: Dolphins are mammals that also give birth to live young. Hence, dolphins are viviparous.
- **Flying Fox**: This is a type of bat that also gives birth to live young, making it viviparous.
- **Blue Whale**: Like dolphins, blue whales are mammals and give birth to live young, so they are viviparous as well.

4. **Conclusion**: All the options provided (Kangaroo, Dolphin, Flying Fox, and Blue Whale) are viviparous animals. Therefore, any of these options can be considered correct.