The Shompen tribe is an indigenous tribe found on the Nicobar Islands, hence option 2 is the correct answer.

Let`s break down the other options:

Option 1 refers to the Nilgiri Hills, which are in the Western Ghats region of India. The tribes residing there include the Todas, Kotas, Irulas, among others, but not the Shompen tribe.

Option 3 refers to the Spiti Valley, located in the Northern part of India in the state of Himachal Pradesh. The locals of this place are primarily Buddhists but again the Shompen tribe is not found here.

Option 4 refers to the Lakshadweep Islands, which are in the Arabian sea. The primary inhabitants here are the Malayali people, not Shompens.

So, the Shompen tribe is exclusive to the Nicobar Islands, placed far from the other mentioned locations, making option 2 the correct answer.