Such question should be tried answering on your own.However here are few points that will help you in framing the answer
Describe the natural beauty of Northeast by focussing on 2-3 state of region.
Then you could discuss why northeast is famous for and also mention about geography of region .
How it can be accessed by tourists and what are famous tourists places one can visit.
Conclude by discussing the paces to stay and the cuisine of the region.
You can give overall view of the region and then focus on only some of states in the region to give more comprehensive answer.