Your answers look good.
Yes, the last sentence can be reworded. Give it a shot.
What happened on April 1st, 1999? Why is this significant?
On April 1st 1999, the NorthWest Territories were split in two. This was so significant because it's what created Nunavut and the Western Territory.
What does this area have for resources?
For resources it has large stores of gold, lead, zinc, and oil and gas.
How does it support itself economically?
It supports itself economically by doing trapping which is the mainstay of the Inuit economy for thousands of years. (Anyway to reword this?)
5 answers
To support themselves economically, they do trapping.
Instead of "do trapping," you could say they "trap" and then list three or four animals they trap.
Okay thank you.
You're welcome.