The Blue Mountains, also known as the Nilgiri Hills, are located in southern India. The question asks which tribal group is predominantly found in this region.

Let`s analyze each option:

1) Lambadas: The Lambadas, also known as Banjaras, are a nomadic tribe found in parts of India. However, they are not traditionally associated with the Blue Mountains.

2) Gonds: The Gonds are one of the largest tribal groups in India and are predominantly found in the central parts of the country. They are not specifically associated with the Blue Mountains.

3) Jarawas: The Jarawas are an indigenous tribe found in the Andaman Islands, not in the Blue Mountains.

4) Todas: The Toda tribe is indeed dominantly found in the Blue Mountains, also known as the Nilgiri Hills. The Toda people have been residing in this region for centuries and have a distinct culture and lifestyle.

Therefore, the correct answer is option 4: Todas.

Alert - Correct answer should be option 4: Todas.