Final answer:
The sentence in question serves as a metaphor, comparing a journey towards an inevitable end, implied by 'death,' through evocative language without using 'like' or 'as,' which would make it a simile.
Step-by-step explanation:
The sentence, "So we drove on towards death through the cooling twilight," functions as a metaphor.
In this sentence, driving is metaphorically compared to moving towards death, implying perhaps an inevitable end or a sense of foreboding but without using words like 'as' or 'like,' which would indicate a simile.
Metaphors are powerful literary devices that create vivid comparisons, leading the reader to understand a concept or situation in a more nuanced or imaginative way.
By likening a journey with a vehicle to moving towards death, the author provokes thought about the underlying meaning or context within the narrative.