Concept:The Tharu tribe is an indigenous community primarily found in the Tarai region of Uttar Pradesh, known for its forest and agricultural lifestyle.Explanation:The Tharu tribe lives in the Tarai region of Uttar Pradesh. They are forest dwellers and also practice agriculture. Their language is Tharu, part of the Indo-Aryan subgroup. The Tarai region is a depositional alluvial plain formed by the Ganga river. It lies south of the Bhabar belt and is characterized by fertile, marshy land. The eastern extension of this region is called Duars in Bangladesh.Answer:C. Tarai region of Uttar Pradesh