The student's research question is clear, focused, and fully relevant to the investigation, as it pertains to the relationship between education level and fertility rate in Singapore from 1970 to 2020. The document effectively discusses overpopulation in Singapore as a local environmental issue, but it would have been beneficial for the student to provide more information about the environmental effects of overpopulation to balance the discussion between the environment and society. Furthermore, the student successfully establishes a connection between the research question and environmental issues by explaining how educational attainment in Singapore influences individuals' reproductive choices and by referencing government campaigns related to family planning.