UPSC CSE Prelims
Question 71
The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon ?
View correct answer and explanation
Correct answer: B
Correct Option: B
Explanation: The Himalayas span the Palaearctic and Indo-Malayan realms with huge elevation and climate variation, making them a biogeographical meeting zone rich in habitats.
Option-wise Analysis:
A: Incorrect - High rainfall is uneven and not a sufficient explanation across the entire mountain system.
B: Correct - multiple biogeographic regions and habitats meet here, supporting high diversity.
C: Incorrect - Exotic and invasive species do occur in Himalayan ecosystems.
D: Incorrect - Human disturbance exists and varies greatly; it is not generally absent.