Answer:

1. "Local folk dance" is any dance form which can be identified as originating with an ethnic culture and expressing the movement aesthetics of that culture. "Foreign folk dance" requires not only an ethnic identification, but a "participatory" and aesthetic tradition.
2. Primarily, it keeps a culture of people alive, by sharing and teaching younger generations the dances. Dance keeps the history of people alive as well. Dances are ways a community celebrates a special event or important date in time.
3. Folk dances are culture in-action. We need to study and learn folk dances because it is the way of preserving our culture and a way of passing the tradition from one generation to another. Being able to learn how a folk dance is danced the way it must be is an obvious indication that a culture still lives on.
4. Tinikling