Q. Why is an understanding of Illustrate what development means crucial to policy formulation in developing nations? Why do you think a nation may have difficulties in agreeing on a rough definition of development? Why do we use purchasing power parity measures when comparing incomes across countries? Assume that you had to elucidate this graph to someone who is not a visual learner He just doesn't get pictures. You have to elucidate every feature of graph utilizing words. Illustrate what are components of Human Development Index? Illustrate what are some strengths and weaknesses of HDI as a comparative measure of human welfare?