Boori Boot Yollo is a major community festival of Arunachal Pradesh. Which tribal group traditionally celebrates the Boori Boot Yollo festival?

Introduction / Context:
This question deals with tribal culture and regional festivals in north eastern India. Arunachal Pradesh has several tribes, each with distinct languages, customs, and celebrations. Boori Boot Yollo is one such festival that often appears in general knowledge and state specific exams. The aim is to correctly associate this festival with the tribe that treats it as a central cultural event.

Given Data / Assumptions:
- The festival name is Boori Boot Yollo, held in Arunachal Pradesh.
- Four tribes are listed: Gond, Bhil, Santhal, and Nyishi.
- The question asks for the tribe that celebrates Boori Boot Yollo as a key festival.
- We assume standard Indian culture sources and state level textbooks for reference.

Concept / Approach:
Gond, Bhil, and Santhal are important tribes but are mainly associated with central and eastern India, rather than Arunachal Pradesh. The Nyishi are one of the major tribes of Arunachal Pradesh. Boori Boot Yollo is widely described as a festival of the Nyishi community, held to invoke blessings for a bumper harvest and communal well being. The best approach is to eliminate the tribes that clearly belong to other regions and select the tribe that is strongly linked to Arunachal Pradesh and this festival.

Step-by-Step Solution:
Step 1: Note that the location of the festival is Arunachal Pradesh in the north east. Step 2: Recall that Gond and Bhil tribes are mainly found in central and western India, for example in Madhya Pradesh and Rajasthan. Step 3: Remember that Santhal communities are more prominent in Jharkhand, Bihar, and West Bengal regions. Step 4: Identify Nyishi as a major tribe of Arunachal Pradesh with well known traditions. Step 5: Connect Boori Boot Yollo with the Nyishi tribe and select Nyishi as the final answer.

Verification / Alternative check:
As an alternative check, think of lists of Arunachal Pradesh festivals. Names like Losar, Solung, Mopin, and Boori Boot Yollo are usually matched with different tribes such as Monpa, Adi, Galo, and Nyishi. Sources on Nyishi culture directly mention Boori Boot Yollo as a harvest festival with rituals, dances, and community feasts. This independent confirmation supports Nyishi as the correct option.

Why Other Options Are Wrong:
Gond: Mostly associated with central India and not with Arunachal Pradesh or the Boori Boot Yollo festival.
Bhil: Primarily found in Rajasthan, Madhya Pradesh, and Gujarat, so this option does not match the Arunachal context.
Santhal: A major tribe in eastern India, especially Jharkhand and nearby states, but not the tribe that organises Boori Boot Yollo.

Common Pitfalls:
A common mistake is confusing the names of tribes located in different regions because many exam questions list several tribal names together. Another pitfall is assuming that any tribal name can fit any tribal festival if the student is unsure. To avoid this, it is helpful to group tribes by state in your notes, so that Nyishi is always remembered with Arunachal Pradesh and Boori Boot Yollo, while Gond, Bhil, and Santhal are placed with their respective regions.

Final Answer:
The Boori Boot Yollo festival is traditionally celebrated by the Nyishi tribe of Arunachal Pradesh.