Fishing was a great source of money for the settlers at Plymouth since their colony was right on Cape Cod, Massachusetts.
All of the settlers of Plymouth were ruled by King Charles I the king of England at the time.
Plymouth's Geography was rocky, sandy, and was on Cape Cod a bay in present day Massachusetts, which made it a good place to fish.
The pilgrims moved from England to Plymouth to have religious freedom so they went against the teachings of the bible and the English priest.
I would compare Plymouth to Jamestown by the fact that they are English settlements. I would contrast Jamestown and Plymouth by the fact that Jamestown was a settlement to make money for the English King and Plymouth was a place for Pilgrims and Puritans to practice their religion freely.