What theme, or life lesson, does the speaker express in "All"?

The travels of marco polo.what is the author’s purpose for writing this text?

What reasons does the speaker provide to support his viewpoint or claim in what to the slave is the fourth of july i read to speech and but i just don't fully understand the question i just want to make sure i get it right so to explain that the question is asking me to do. and you!

In the declaration of independence, thomas jefferson states that governments derive their power from