Which of the following industries in India is the most labour-oriented?

Cotton Industry in India is the most labour-oriented. Cotton plantations required vast labour forces to hand-pick cotton and it was not until the 1950s that reliable harvesting machinery was introduced in the South. During the early 20^th century, employment in the cotton industry fell as machines began to replace labourers and the South's rural labour force dwindled during the First and Second World Wars.