Understanding the Use of 'Upon' as a Preposition

The word 'upon' in the second sentence is classified as a preposition. Prepositions are words that show the relationship between a noun or pronoun and other parts of the sentence. In this particular instance, 'upon' is used to pinpoint the precise moment or event that triggers a feeling of accomplishment and pride. Think of it as highlighting the cause and effect relationship. The action of crossing the finishing line is the cause, and the resulting feeling of accomplishment and pride is the effect. 'Upon' acts as the bridge connecting these two elements.