Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The word "obediently" is classified as an adverb because it describes how an action is performed, specifically indicating that it is done in an obedient manner. Adverbs often modify verbs, adjectives, or other adverbs, and they provide additional information about the manner, place, time, frequency, or degree of an action. In this case, "obediently" modifies a verb by explaining that the action is executed with compliance or submission.

To break down its formation, "obediently" is derived from the adjective "obedient." By adding the suffix "-ly," which is commonly used to convert adjectives into adverbs, we create an adverbial form that conveys how something is done. For example, in the sentence, "The dog followed the command obediently," the adverb "obediently" describes how the dog followed the command, indicating the manner of its compliance.

In contrast, the other options do not fit: "obedient" serves as an adjective, nouns do not express actions, and "obediently" cannot function as a verb. Therefore, option A) adverb is the correct classification for the word "obediently."