Why man become intelligent by eating fish?

While some studies suggest that eating fish rich in omega-3 fatty acids may have positive effects on brain health and cognitive function, the idea that eating fish directly results in increased intelligence in humans is not supported by substantial scientific evidence. Intelligence is influenced by a complex combination of genetic, environmental, and nutritional factors, and while a balanced diet that includes a variety of nutrient-rich foods can contribute to overall health and well-being, it is unlikely to be the sole determinant of intelligence.