A primary source is made by someone who was there during the event. In this case, it’s the American Revolution. There isn’t a provided picture (well at least on my screen there isn’t) so I can’t give whatever the choices are, but some examples of a secondary source are:
textbooks, book reviews, reprints of maps/artworks, etc.
Do you have a pic I don't really understand?
Answer:
In Athens, men over the age of 20 were citizens, while in Sparta, all adults were citizens.
Explanation:
b
Answer:
A. They limit human work in hazardous enviroments.
Explanation:
Answer:
because it became less economically viable to push the borders further, and because of the Persians in the east.