Question

The primary economic activity of the outback is

Answer 1

It might be D considering the location.

Answer 2

Answers for the entire quiz.  

1. Mariana Trench: The deepest ocean depth in the world is found here
2. Archipelago: Chain of islands
3. Great Barrier Reef: Australia's natural wonder that can be seen from space
4. Ring of Fire: 75 percent of the world's active volcanoes are located here
5. Milford Track: Destination for hikers in New Zealand
6. Japan
7. It is smaller than the continental United States in size, but has the same population.  
8. Mining Mineral Resources
9. The Outback
10. Tasman Sea