“The largest waves happen during the first hour of sleep, which is the part known as slow sleep” Is the dependent clause “which is the part known as slow sleep” ? if so, whats rhe subject and predicate?

How does this excerpt from of plymouth plantation show the influence of religion in early american literature? puritans believed it was by god's provision of protection that they survived. puritans believed god must be included in all written documents puritans believed god would give them a simpler path to their destination puritans believed their experiences would influence others to follow god's path ?