Final answer:
Pennsylvania was hailed as the most successful British colony for its religious freedom, peaceful relations with Native Americans, and inclusive sense of community.
Step-by-step explanation:
Pennsylvania was the most successful British colony due to its religious freedom, fair dealings with the Indians, and emphasis on brotherhood. The colony provided a safe haven for Quakers who faced persecution in England and other colonies. Pennsylvania's founder, William Penn, established a framework of tolerance and promised land to those who settled there, encouraging a large number of people seeking a new start to immigrate. Unlike many other colonies, Pennsylvania did not establish an official church and allowed various faiths to coexist, paving the way for greater religious diversity. This tolerance, economic opportunities, and the peaceful relationship with native peoples helped make Pennsylvania a prominent and prosperous colony.