Here's why:
* Conjunctions connect words, phrases, or clauses. "And" specifically joins things that are similar or equal.
* Example: "I like apples and oranges."
* Prepositions show the relationship between a noun or pronoun and another word in the sentence. They often indicate location, time, or direction.
* Example: "The book is on the table."
* Interjections are words or phrases that express strong emotion.
* Example: "Wow! That's amazing!"
Let me know if you have any other grammar questions!