Here's why:
* Adjectives modify nouns and pronouns, providing more information about their qualities or characteristics.
* They answer questions like: What kind? Which one? How many? How much?
Examples:
* The red car (red describes the car)
* A beautiful day (beautiful describes the day)
* Three happy children (three and happy describe the children)
* A large pizza (large describes the pizza)
Let me know if you'd like more examples or have any other questions!