The student clearly identifies the independent variable, screen light intensity, and the dependent variable, survival rate of Biston betularia, within the research question. The methodology is well articulated, describing the analysis conducted through a simulated natural selection experiment and providing a detailed background theory relevant to the investigation. The student explains the choice of materials, sampling techniques, and controlled variables effectively, ensuring the investigation can be reproduced. However, there are notable omissions regarding the discussion of trials, safety, ethical, and environmental issues, which could enhance the overall rigor of the investigation. Overall, the methodology is concise and free of irrelevant information, allowing for a clear understanding of the experimental process.
