Here's why:
* Adverbs modify verbs, adjectives, and other adverbs. They provide information about how, when, where, why, to what extent, or how often an action is performed.
For example:
* Verb: "The dog ran."
* Adverb modifying the verb: "The dog ran quickly."
* Adjective: "The flower is beautiful."
* Adverb modifying the adjective: "The flower is very beautiful."
* Adverb: "He spoke slowly."
* Adverb modifying the adverb: "He spoke extremely slowly."