During the French Revolution they sent men to "The New Work" and come across Native Americans. They began to study the Native People and incorporate some of their retrials.
The meaning of the quote "Without feeling of respect, what is there to distinguish men from beast" is a saying that humans have a certain level of consciousness that separates us from any other creature. We he created this type of society where we are expected to uphold certain standards, unlike our more primitive counterparts.
Assuming that *** denotes your choice, you've gotten them all correct!