They might not be online, so posting your plea for help on a student homework question platform is likely not going to give you much.
Just saying.
Initially, the Europeans thought the the plague, also referred to as Black Death, was a punishment from the Gods, and this was a belief that was started in the church circles, and they thought that God is punishing the people for their sins. This belief was quickly spread around, and people were indeed in big panic because it was a pandemic that was spreading around very quickly and was fatal.