In the declaration of independence jefferson refers to natural rights as

Thomas Jefferson used natural rights as a way to declare independence from England.

Here's the actual quote:

"Natural rights are those which appertain to man in right of his existence. Of this kind are all the intellectual rights, or rights of the mind, and also all those rights of acting as an individual for his own comfort and happiness, which are not injurious to the natural rights of others."

What this text means is that natural rights are rights we have as a conscious human being. They should come naturally to a person, hence the name. Hope this helps!

Just think, why was it effective? -it appeled to critics because it was written well, that made it noticeable to the public including the white population-it was also recognizable to the african americans because it was about their heritage.-it was powerful just keep finding more points and elaborate on them. message me if you need more