Fill in the blank with the most appropriate word.

The word ‘enough’ means ‘as much as is necessary; in the amount or to the degree needed’. It is correct here. Extinction. This ominous word has one meaning. The death of a species. And it is a word that we seem to hear so often these days, especially in the news. But the opposite is possible. The world and India can celebrate the recovery of at least one endangered species. India is now reporting increased tiger numbers, and a recent International Union for Conservation of Nature assessment suggests that tiger numbers have increased by 40% since 2005. This is cause for celebration. But is the rise in tiger numbers enough to prevent their extinction?