Here's why:
* Prepositions are words that show the relationship between a noun or pronoun (called the object of the preposition) and another word in the sentence.
* They often indicate location, direction, time, or manner.
* They create prepositional phrases, which act as adjectives or adverbs, modifying other words in the sentence.
Example:
* "The book on the table"
* "on" is the preposition
* "the table" is the object of the preposition
* "on the table" is the prepositional phrase, modifying "book" (acting as an adjective).
Let me know if you'd like more examples or clarification!