Answer:
A. slavery
Step-by-step explanation:
Child labour is the major problem from industrialisation period. Children are easily available for work due to their parent’s poverty and illiteracy. Many cunning capitalists and money lenders done their labour work through children because they are available for low salary and less demand labour forces. Indian constitution abolished child labour through Articles 23 and 24. Child labours are treated as slaves, this type of labour forces mostly concentrated in the primary and secondary sector activities.