Answer:
The theme of "Coming to America" is closely related to the subject matter of "Of Plymouth Plantation" as it tells the story of the Pilgrims' journey to the New World, their struggles and hardships, and the establishment of the Plymouth Colony. The book provides insight into the reasons why the Pilgrims left England and the challenges they faced in the New World. It also highlights the cultural and religious beliefs of the Pilgrims, and their interactions with the Native Americans.
Overall, "Of Plymouth Plantation" is an important primary source for understanding the early history of the United States, and it is closely related to the theme of "Coming to America" in its account of the experiences of the first English settlers in the New World.