Here's why:
* Adverbs modify verbs, adjectives, or other adverbs.
* They answer questions like "how," "when," "where," or "to what extent."
Let's see them in action:
* Carefully: "He walked carefully across the icy bridge." (modifies the verb "walked")
* Easily: "She could easily lift the heavy box." (modifies the verb "lift")
Therefore, "carefully" and "easily" describe the manner in which actions are performed, making them adverbs.