If you are referring his defeat at the end against the dragon, that is because of his hubris. He was too proud and believed that he could do it alone without his soldiers. This brings his defeat and he realizes that he will die because of his hubris, after which Wyglaf will take over since he was the only one brave enough to help.
Answer:
A 2013 preliminary study at UCLA on the effect of antioxidants found in pomegranates on memory.
Explanation:
The rest of the sources are either not credible in terms of research such as the magazine article and the trainer. The advertisement has bias when providing information making the study the best choice.