The given excerpt is about what different countries in the Middle East and North Africa are doing about Climate Change. Sentence 3 introduces the topic by saying that the mentioned countries can do little about climate change. Sentence 5 mentions the reason for the above problem. Statement 1 says that some countries are at least trying. Sentences 2 and 4 build on the above idea by mentioning the projects in Morocco and Saudi Arabia. Thus, the correct sequence is 3−5−1−2−4. The answer is option D.