Saw off Jim's leg i think
It's a metaphor.
To help you understand why, here's the definitions of both:
Simile: it's a <span>figure of speech involving the comparison of one thing with another thing of a different kind, it's used to make writing seem more vivid.
Metaphor: this is also a</span><span> figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable.
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Answer:
Well the organ that you are using would be your BRAIN
The answer is B. It doesn't open any new thoughts. It's not supposed to. It also cannot stand alone. And has to have an independent clause at the end.