The student's choice of the topic is justified through apparent personal significance and curiosity. This is evident from the student's explanation of personal experiences related to warm beverages during rainy seasons, which led to curiosity about the cooling process and the impact of glycerol concentration. Additionally, there is clear evidence of personal input and initiative in the design, implementation, and presentation of the investigation. The student demonstrated personal involvement and initiative throughout the investigation, from formulating the research question based on personal curiosity to designing the experiment, conducting trials, processing data, and discussing strengths and weaknesses.
