Is allusion is a way to compare history with the current subject of the poet?

Allusion is a figure of speech, in which one refers covertly or indirectly to an object or circumstance from an external context.[1] It is left to the audience to make the connection;[2]where the connection is directly and explicitly stated (as opposed to indirectly implied) by the author, an allusion is instead usually termed a reference.[3][4][5] In the arts, a literary allusion puts the alluded text in a new context under which it assumes new meanings and denotations.[6] It is not possible to predetermine the nature of all the new meanings and inter-textual patterns that an allusion will generate.[6] Literary allusion is closely related to parody and pastiche, which are also "text-linking" literary devices.[6]

In a wider, more informal context, an allusion is a passing or casually short statement indicating broader meaning. It is an incidental mention of something, either directly or by implication, such as "In the stock market he met his Waterloo."

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.