The correct answer is: a) Shivalik foothills region.
The Shivalik foothills region is a hilly area in the northern part of Punjab. It is home to a large number of Scheduled Tribes, who are indigenous peoples of India. The Scheduled Tribes are a diverse group, with their own languages, cultures, and customs. They have a long history of living in the Shivalik foothills, and they continue to play an important role in the region’s economy and culture.
The border areas with Himachal Pradesh are also home to a significant number of Scheduled Tribes. However, the population density in these areas is lower than in the Shivalik foothills. The industrial areas of Punjab are home to a large number of people from all over India, and the Scheduled Tribes make up a small minority of the population in these areas. The central plains of Punjab are the most densely populated region of the state, and the Scheduled Tribes make up an even smaller minority of the population in these areas.
In conclusion, the Shivalik foothills region is the region of Punjab with a relatively higher concentration of Scheduled Tribe population.