PASSAGE 9 (Questions 1-5)

Directions: In the below given passage, there are blanks each of which has been numbered. Five words are suggested, one of which fits the blank appropriately. Find out the appropriate word in each case.

The world's climate has always changed and species have evolved accordingly to survive it. The surprising fact about the __(1)__ between evolution and global warming __(2)__ __(3)__ temperatures alone are not that it is not linear. __(4)__ of evolution. Evolution is also the __(5)__ of seasonal changes.

[IDBI(PO),INDIAN BANK(PO), 2011/2009]

Select the appropriate word for blank 1.