A: 8 A friendly competition (since it talks about beating it's neighbor for the spot of the wettest place of Earth)
B: 5 A fertile environment (since it talks about having varieties of colorful plants and flowers along with fruit trees and forest cover)
C: 2 The changing weather pattern (since changes in temperature and average rainfall is being mentioned)
D: 1 Is climate change to blame? (since global warming is being blamed for the changing weather patterns)
E: 7 The destructive power of rain (since it talks about how unchecked flow of rainfall water can destroy crops and villages)
F: 4 Outlook of the Future (since it talks about how future situations may worsen if steps are not taken in present times)
F: 3 Rain in the Lifeless desert
Number 6, Celebrating the New Year in India is the extra idea.
A: 8
B: 5
C: 2
D: 1
E: 7
F: 4, 3