Marsupials occur in

Options

A. Africa
B. North America
C. Asia
D. Australia .

Answer

**Step-by-Step Solution:**

1. **Understanding Marsupials**: Marsupials are a group of mammals characterized by giving birth to relatively undeveloped young, which then typically continue to develop in a pouch on the mother's belly. Examples include kangaroos, koalas, and wombats.

2. **Historical Distribution**: The oldest known marsupials were found in North America. However, they became extinct in that region approximately 66 million years ago.

3. **Migration of Marsupials**: After their extinction in North America, marsupials migrated to South America. From there, they continued their journey and eventually reached Australia.

4. **Current Distribution**: Today, marsupials are predominantly found in Australia, where they have become the native species. They are not originally from Australia but are considered immigrants that adapted and thrived in that environment.

5. **Analyzing the Options**:
- **Africa**: Incorrect, as it is known for other mammals like elephants.
- **North America**: Incorrect, as marsupials are extinct there now.
- **Asia**: Incorrect, as marsupials are not primarily found in this region.
- **Australia**: Correct, as it is the current home of marsupials.

6. **Conclusion**: The correct answer to the question "Marsupials occur in" is Australia.

**Final Answer**: Australia

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