An independent clause is a sentence or part of one that can stand alone.
So I have a feeling that the first one is correct as "My sister and I love to cook" and "we spend hours cooking together" can both stand alone yet are joined by a semicolon.
I hope this has helped
I feel shy when I have to ask for help
The branch of chemistry that deals with carbon compounds (other than simple salts such as carbonates, oxides, and carbides).
