Question

Upon arriving at the science lab, Sarah eagerly prepared her experiment for the upcoming demonstration.
the answer is prepositional
Why is this answer correct?

Answer 1

The answer is correct because the word "for" is a preposition. Prepositions show a relationship between a noun (or pronoun) and another word in the sentence, indicating location, time, direction, or manner. In this case, "for" shows the purpose or reason for Sarah's preparation of her experiment.