Which ancient greek pre-socratic philosopher is famous for leaving bits and fragments of his philosophy, including riddles like "the sun is the width of a human foot," and "you cannot step into the same river twice"?

How has the money from oil production in the middle east not impacted the people of that region? a) it improved education and jobs in the region. b) it improved infrastructure such as ports, roads, and bridges. c) it increased life expectancy due to improved healthcare facilities. d) it increased political stability and lessened the presence of corruption.