What religion did the Pilgrims practice when they settled in Plymouth?

The Pilgrims who settled in Plymouth practiced Puritan Christianity, which was a reform movement within Protestantism that sought to eliminate what they considered remnants of Catholicism from the Church of England. The Pilgrims were a group of separatists who believed in the importance of personal faith and direct access to God, which led them to separate from the Anglican Church. They aimed for a more purified form of worship and church governance, reflecting their desire to create a community where they could practice their faith freely and according to their beliefs. This commitment to their religious principles was a driving force behind their decision to leave England and establish a new settlement in America, where they could build a society based on their understanding of Christian teachings. Thus, Puritan Christianity is the correct answer, as it directly aligns with the beliefs and practices of the Pilgrims in Plymouth.