Pick out the three examples from the novel which throw light on the puritan way of life as it was in 17th century america

There so many but here are a few:

-Hester receiving the scarlet letter in the first place is a Puritan thing to do. Public humiliation/repentance...

-The prison and a graveyard being the first thing to build.

-Rigid church ritual.

-Moral/spritual Hypocrisy