Explanation:

- The concept of "Lawm" is associated with the Kukis.

- It is a traditional form of youth club where boys and girls participate in social activities.

- These activities benefit both individuals and the community, fostering social unity and cooperation.

1. Kukis:

- The correct option.

- Known for having the Lawm, a culturally significant youth organization.

2. Nagas:

- Another tribal community in northeastern India.

- They have their cultural practices and social structures, but not specifically associated with "Lawm".

3. Monpas:

- A tribe primarily located in Arunachal Pradesh.

- They have different social institutions and traditions.

4. Noctes:

- A tribe found in Arunachal Pradesh.

- They have unique customs but don't have a concept like "Lawm" associated with them.

Correct Answer: Option 1 - Kukis