What has enabled Singapore to achieve a high level of economic development?

Please answer the question in 3 to 4 paragraphs. 

MLA formating. 
Grade criteria: 
1. Topic Sentence: You must begin your answer with a clear topic sentence. 
2. Supporting Points: You must provide at least three clear and distinct arguments to support the assertion that you have made in your topic sentence. 
3. Grammar: Points will be deducted for grammatical errors