In <em>The Crucible</em>, Tituba is an enslaved woman originally brought from Barbados. She is accused of witchcraft, and she confesses to this crime. However, she clarifies that her acts were not intended to be evil, and were instead habits and cultural traits brought over from the Caribbean. Moreover, Tituba tells us that other girls participated in these acts with her, which allows her to escape punishment.
I believe it is number 3 as it states that fire has been useful in many ways. The others are saying fire has been useful for specific things. The main idea should cover it all.