In your own words, explain what 'faith' means within Islam.

Faith in Islam is the moral ground and basis for action and not a dogmatic assertion of salvation-justification like Christianity. The well-being of man, therefore, depends upon faith that is accompanied by good actions.

Definition of faith in Islam:

The intended meaning of faith in Islam is important for us to understand, as mistaken definitions of faith have caused a number of problems in early Islamic history up until the present time. However, the righteous predecessors had a clear definition of faith that should serve as the basis of our understanding of Islam.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.