question_answer

                Students in a school are often classified into primary and secondary or junior and senior. What is the criterion that is used. Do you think this is a useful classification? Discuss.

Answer:

                  The history of developed countries indicates that there bas been a major shift from the secondary sector, i.e., manufacturing and industries, to the tertiary sector, i.e., services. The service sector has become the most important sector of the economy and most of the employed people in the developed countries are employed in this sector.