#1 'Culture' is the set of social norms found in human societies.
#2 'Ethnicity' is the continuity of a people rooted in the heritage of family, clan, or tribe.
#3 'Religion' is the orientation of ethics, traditional dogmas, and/or faith
The norms of religiosity can fringe between theological, mystical and/or rationalism.
Religiosity can differ radically, for example Christianity is more centered in Salvation yet Islam is more centered in Submission.