Final answer:
The preposition in the given options is B)'down'. Prepositions show the relationship of a noun or pronoun to another word in a sentence.
Step-by-step explanation:
The preposition in the given options is B. down.
Prepositions are words that show the relationship of a noun or pronoun to another word in a sentence. They often indicate location, direction, time, or manner.
In the case of the word 'down', it indicates movement or position in a lower place or direction.