Topic: Adjective (বিশেষণ),

Best Answer Explained in Below-:

The word "friendly" is classified as an adjective because it describes a quality or characteristic of a noun. Adjectives are words that modify or provide more information about nouns, and they can convey traits, colors, sizes, emotions, and more. In this case, "friendly" describes a person's or an entity's disposition towards others, indicating warmth, kindness, and a willingness to engage positively.

For example, in the phrase "a friendly dog," the adjective "friendly" tells us what kind of dog it is—namely, one that is affectionate and approachable. On the other hand, the other options do not fit:

- A noun (Option A) refers to a person, place, thing, or idea, which "friendly" does not represent.
- An adverb (Option C) modifies verbs, adjectives, or other adverbs and typically ends in "-ly," but it describes how an action is performed (e.g., "She smiled kindly") rather than describing a noun.
- A verb (Option D) expresses action or a state of being, which is not applicable here.

Thus, option B, "adjective," is the correct answer, as it accurately reflects the function of the word "friendly" within the context of language.