Self-tutoring about religious history: the tutor examines the premise of Baal worship, which is forbidden by the Old Testament.
A Baal is a local deity that some people of the Middle East, in antiquity, would worship.
By one of the Ten Commandments, Baal worship is forbidden:
You shall have no other gods besides Me. (Exodus 20.3)
Source:Oracle Tutoring by Jack and Diane, Campbell River, BC.