Word formation
For questions 1-8, read the text below. Use the word given in capitals at the end of some of the lines to form a word that fits in the gap in the same line.
الكلمات الأساسية:
Coral reefs cover less than one per cent of the ocean floor, yet they are home to an 1. proportion of marine species. Sadly, they are also 2. vulnerable to rising sea temperatures. When the water becomes too warm, corals expel the tiny algae that live inside them and turn white, a process known as bleaching. If conditions do not improve, the corals die. In response, scientists have developed methods of growing young corals in underwater nurseries and transplanting them onto 3. reefs. Early results have been 4., with survival rates of over eighty per cent at some sites. Critics, however, question the 5. of restoring reefs on a large scale, pointing out that the work is slow and 6.. They also warn that restoration risks becoming a 7. from the real task of cutting emissions. Most researchers agree that nurseries alone are no solution, but they argue that, in the meantime, they offer a 8. way of buying time.