Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They tell us how, when, where, or to what extent something happens.
* "Very" tells us to what extent something is true. For example:
* "The dog is very happy." (Modifies the adjective "happy")
* "She ran very fast." (Modifies the adverb "fast")
Let me know if you'd like to explore other word types!