Answer:
The image that portraits better the passing of the time is when the author writes “The twilight darkens”
Step-by-step explanation:
It is well known that when a day is elapsing it brightens a first because of the sun, but then it starts to darken. When the author says that the twilight darkens it means that the time is passing and the day is finalizing. Hence this is the image that portraits better the passing of time.