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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
<span>He felt confused because of all of the new sensations.
Hope this helps.
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The only following here that is a nonprint source is a photograph, since no writing is needed.