What’s with you and these questions
The correct answer is metaphor.
Passing the torch is a metaphor which means that you are passing on some traditions or knowledge to someone else. It can't be an allusion because allusion is a reference to something outside of the text; simile is comparison using words such as like or as; personification is when non-human entities or objects have human characteristics.
I think the correct answer from the choices listed above is the second option. The word that has a neutral connotation would be multilevel. Connotation is the associated or secondary meaning of a word or expression in addition to its explicit or primary meaning. Multilevel in any definition would not relay any good or bad feeling to it. Hope this answers the question.
:)