It would be imperative because it shows vital importance
The correct option is C:<em> No country on Earth is immune from water shortages.</em>
Nowadays, water shortages are a worldwide problem. Not only South Africa or the United States, but also many other countries in the world suffer from water problems. In this way, a potential solution at local level could be not enough. It is necessary to take actions that revert this situation as soon as possible.
Similarly, school >> fish. ie, the relationship of 'pride' to 'lions' is of being a word for a group of them. It is the same with school in relation to fish. 'Pride' is the same idea in relation to lions, as 'school' is in relation to fish
