Select the most appropriate adjective to fill in the blank. Vighnesh is always…

A fill-in-the-blank vocabulary item like this calls for the adjective whose core dictionary meaning matches the trait or manner being described in the sentence, not simply a word that sounds plausible in isolation. Adjectives describing a person's temperament or manner in interaction (friendly, courteous, easy to talk to) belong to a different category than adjectives describing physical build, physical condition, or size.

Here the sentence describes how Vighnesh consistently behaves while talking to his elders — it calls for a word about his conversational manner or disposition toward older people. "Affable" denotes being friendly, warm, and easy to approach in conversation, which is exactly the kind of trait the sentence is describing about his manner of talking.

• "plumpy" is an informal, non-standard variant of "plump," describing a rounded or chubby physical build — a description of body shape, not of conversational manner.

• "dilapidated" describes a building, structure, or object that has fallen into disrepair through age or neglect — it does not apply to a person's demeanor.

• "petite" describes a small, slender physical build, typically used for a person's stature — again a physical description, not a manner of interacting.

Checking each option against the category the sentence calls for (a trait of conversational manner, not physical build or condition) confirms that only "affable" fits, since it is the sole option describing a friendly, approachable way of talking to others.