The student includes five supporting documents, which are contemporary and published within a maximum of three years prior to the submission of the IA, providing a solid foundation for evaluating Lego's sustainability initiatives. The documents are relevant and sufficiently in-depth, offering a range of ideas and views on the topic. However, the student does not label each document clearly, highlight key excerpts related to the IA, or assess the validity and reliability of the supporting documents, which are areas that need improvement. Overall, the student demonstrates a thorough understanding of Lego's sustainability practices through the selected sources.