In australia, when aborigines become part of the dominant society but then refuse to acknowledge their grandparents' traditional tribal ways, they are practicing the process of

Aborigines were practicing the process of assimilation when they became a part of the dominant society in Australia but then refused to acknowledge the traditional tribal ways of their grandparents.

Assimilation is when a group slowly adapts to the attitudes and customs of the dominant customs and culture.

b) to encourage free trade