What is the possible reason that some foods promote the brain performance?

Why certain food choices might help the brain function better remains unclear. Perhaps these regimens’ known cardiovascular benefits, which promote a good flow of blood and oxygen to the brain, are key. But other factors may be at work. Of course, questions about when these dietary changes need to happen or how diet stacks up against other factors, such as physical activity, sleep patterns and genetics also remain unanswered.

Certainly Shakespeare’s plays reflect local issues. That is why dramatists write plays. Henry VI is about fifteenth-century history but it is also about fear of civil war. Hamlet is about usurpation but it is also about bereavement. Macbeth is about political disloyalty but it is also about influence and definitions of manhood. And that is why later centuries revive older plays: their topicality is newly applicable, their material is renewably, and in some cases ubiquitously, endlessly topical.