Institution: জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় (JKKNIU) Exam: ক ইউনিট || জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় || 2013
Topic: Sentence (বাক্য), Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The word "fatherly" is classified as an adjective because it describes a specific quality or characteristic associated with a father. Adjectives typically modify nouns by providing additional information about them, such as their qualities, quantities, or states. In the phrase "his fatherly affection," the adjective "fatherly" modifies the noun "affection" to convey that this particular type of affection is reminiscent of or typical of a father's love.

Adjectives can be identified by their function in a sentence—namely, they often answer questions like "What kind?" or "Which one?" When we ask what kind of affection it is, we find that it is "fatherly," effectively using the adjective to provide context.

In contrast, adverbs modify verbs, adjectives, or other adverbs and typically answer questions like "How?" or "When?" Nouns represent people, places, things, or ideas, while prepositions show the relationship between nouns and other words in a sentence. Since "fatherly" fits the role of describing "affection," it confirms that the correct answer is A) adjective.