Nonfiction is considered a type of literature because it

There are two major differences between fiction and nonfiction. First, nonfiction writers must stick to things that really happened; writers of fiction can make up anything they wish. Second, fiction depends on a plot; nonfiction writers are much freer to bounce around in space and time to make their points.

So your answer is Nonfiction is considered a type of literature because it bases its overall plot on actual historical events.

ok so like i went to wiki and looked up the (constitution x new "hammystan")and it showed me the picture it highlights new hampshire and says first and second session and than it says that they hit up the u.s and was like "ey dude that paper u sent us was adopted it bro thx" xd syays it all on wiki/the pic

i dont really like reading so i guess other people might not like reading either so   imma put the answer in bold italics