The student clearly states the independent variable as the incubation temperature of lentil extracts and the dependent variable as the soluble protein concentration. However, the research question lacks a specific description of the method of analysis, which should have been slightly clarified to better connect it to the dependent variable. The student provides a comprehensive background theory relevant to the research question, explains the choice of techniques for measuring variables, and discusses the sampling technique effectively. Additionally, the student addresses controlled variables, safety, ethical, and environmental issues, while also providing a detailed and clear methodology that can be reproduced without irrelevant or repetitive information.