The student outlines an appropriate method to investigate the impact of traffic-related air pollution on lichen growth, using distance from the main road as the independent variable and the percentage of living lichens as the dependent variable. The proposed method is capable of collecting relevant and sufficient data while the sampling approach is clearly outlined, involving sites spaced 5 meters apart and varying heights on the rock wall. However, the method lacks sufficient detail for replication, as it does not provide information about the rock wall's characteristics or the rationale behind the selected variables. Additionally, the student does not address potential risks, environmental considerations, or ethical issues associated with the exploration, which are necessary for a comprehensive understanding of the study's implications.
