Pranjol was born and brought up on a tea plantation in Assam. Tea gardens were a common, everyday sight for him, not something special or exciting. He had seen them all his life, so Rajvir's enthusiastic reaction seemed unnecessary to him. He simply said, "Assam has the largest concentration of plantations in the world. You will see enough gardens to last you a lifetime!" — showing that for him, the tea gardens held no novelty or wonder.
Source: Tea from Assam, Chapter 5
The examiner wants you to contrast Rajvir's perspective (first-time visitor, filled with curiosity) with Pranjol's perspective (local, grown up surrounded by tea gardens). The key phrase from the text — "Pranjol, who had been born and brought up on a plantation, didn't share Rajvir's excitement" — is the direct answer. Always quote or paraphrase the textual reason; don't just say "he was bored."