A primary source comes from a first-hand witness's point of view which makes the information from that source more valid than a secondary.
Http://www.philosophypages.com/hy/2g.htm try this website, hope it helps!
Answer:
Separation of powers is a model that divides the government into separate branches, each of which has separate and independent powers. By having multiple branches of government, this system helps to ensure that no one branch is more powerful than another.
Explanation:
I believe that they are just cousins, I don't remember much. Sorry if i got it wrong