This is a research paper. You should cite at least three non-internet sources (books, academic journals, encyclopedias). Citing internet sources is allowed, but don't confine yourself to these. Try to find sources that have been prepared for publication in a peer reviewed setting. Be sure to include a bibliography or works cited page. If you write a biographical paper, be sure to do more than just tell the story of the life of your subject; place their life in the context of the religious tradition with which they are associated, indicating how their life exemplifies that tradition.
Topics:
Monasticism: its nature and its place as a path to sanctity in Christianity.
Prayer: its purpose, the ways it is practiced, and its role in everyday life.
The Sacred: how it is conceived and experienced in different religious traditions
Mysticism: its nature and the different forms it takes.
Art: the role it plays in developing religious feeling and tradition. (e.g.: Eastern Orthodox icons)
Symbols: their origin and meaning in different religious traditions.
Authority over tradition: how it is established, and the role it plays in different religious traditions.
Saintliness: how human piety and sanctity are conceived and recognized.
Salvation: how it is conceived and how an individual achieves it.
Sacred Law: how it is established and the role in plays in religious life.
Prophecy and Revelation: their nature and the role they play in religious traditions.
These figures might make interesting subjects for biographical papers:
Abraham Mohammad Martin Luther King St. Paul
King David Mother Theresa Imam Ali Elie Wiesel
Martin Luther Saladin The Baal Shem Tov Fatima