Final answer:
In the analogy 'Photograph is to camera as poem is to ______,' the blank should be filled with 'Writer' as poetry is crafted by a writer, much like a photograph is taken by a camera.
Step-by-step explanation:
The given analogy asks to complete the sentence: Photograph is to camera as poem is to ______. In this analogy, a photograph is something created with a camera, so we need to find what creates a poem in the same manner. If we delve in the context of creation, a poem is created by a poet much like a photograph is created by a camera. Therefore, the correct completion of this analogy is D) Writer, since a writer, or specifically, a poet, creates a poem.