Answer:
Arnold is a born librarian, he loves books.
Explanation:
When connecting two independent clauses (clauses with a subject and verb that can stand alone), you need to use a conjunction or a semicolon like in the third sentence. This one has the comma, but neither of those, <u><em>so</em></u> it is incorrect. (see what I did there? I used a conjunction to connect my two independent clauses! B) )
Hope this helps! Happy learning, friend!
True Margaret fuller never lived there
Climate change will soon end our earth if we do nothing about it and it’s affects can not be reversed or turned back