Read the excerpt from "introduction to poetry" by billy collins.

i ask them to take a poem
and hold it up to the light
like a color slide

or press an ear against its hive.

which line from the excerpt contains a metaphor?

"or press an ear against its hive,"

 I'm assuming in this poem Billy Collins is comparing the act of reading a poem to the act of listening for the sound of honeybees but since it isn't mentioned it would be an "implied metaphor" which is comparing two unlike things without mentioning one of them. Hope this helps. 

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