Answer:
Your guess about why a person would join a cult is an example of a hypothesis.
Step-by-step explanation:
A hypothesis is an assumption which needs to be tested in order to determine if it is true or not. It is the basis for a theory since once it is experimented, more assumptions and new information will come into account.
In this case, you have information about what a cult is and you develop a hypothesis about why people tend to join them.