Read the extract and answer the following:
Labour refers to any physical and mental endeavour undertaken for the purpose of producing a good or a service. In India, in 2012 there were 487 million workers, the second largest after China. About 94% of Indian Labour is involved in the unorganised sector comprising semi-skilled and unskilled workers ranging from push cart vendors to home-based diamond and gem polishing operators. The organised sector includes workers employed in the public sector and the private sector.
(1) Explain any four special characteristics of labour.
(2) With suitable examples explain three classifications of labour.
(3) Define efficiency of labour. Briefly explain the impact of technology on the efficiency of labour.