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.
Pious or piety means being devoted to something (more specifically god) In the poem however he wants to be bound by natural piety or devoted to the natural world or nature, so natural piety is devoted to nature or the natural world
