What is the base for a country to be classified into construction sector manufacturing sector and service sector?

I would put it this way: Construction sector. This would mean a country that undertakes to spin it economy from construction of buildings,bridges,infra structures for its economic development and per capita income. manufacturing sector. This would mean a country that relies on manufacturing for export and derives its income from such exports. service sector. this would mean a country that derives its per capita income from services rendered localy.