The student has presented a clear and focused research question that identifies the independent variable as the pH of the soil and the dependent variable as the abundance of ground invertebrates, relevant to an unmanaged ecosystem in Bangkok, Thailand. The investigation discusses acid deposition as a significant environmental issue, detailing its causes and local relevance through data from EANET. However, the student has not established a clear connection between the research question and the environmental issue, as the explanation of how measuring ground invertebrates in relation to soil pH clarifies the impact of acid rain on local ecosystems is lacking. Additionally, the connection between the research question and the environmental issue needs to be more explicitly explained to enhance the understanding of how changes in soil pH affect invertebrate health and abundance.
