The underlined part differs in:
1. tribal: tribe is the noun form, while the others are verbs.
4. celebrate: celebration is the noun form, while the others are verbs.
Therefore, the correct answers are:
1. A. tribal
4. A. celebrate
For the other options:
2. invited, served, interacted, greeted: All are past tense verbs.
3. place, craft, face, express: All are nouns.
5. roofs, tickets, tops, mushers: All are plural nouns.