Answer:
At
initial stage of development primary sector was the most important sector of
economic activity. As agricultural sector began to develop, it produced much
more food than before. Many people began to take up other profession.
As
new methods of manufacturing were introduced, factories came up and started
expanding. Now people began to work in factories in large numbers. Secondary
sector gradually became the most important in total production and employment.
In
the past 100 years, there was a further shift from secondary to tertiary sector
in developed countries. This sector has become the most important in terms of
total production. Most of the working people are employed in this sector. This
is the general pattern observed in most of the developed countries. (5)
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