I posed this question.

#Justsaying

Conduct household surveys in selected areas to gather information about child labor incidence, family income, education, and employment.

That's part of the answer, dear Barun, because where does remote sensing come in, in his story? But you are n the right track, you do need the data you cited, at least some of them; especially data on child employment.

Think for example about child labour in the brick industry? How would you proceed in that case?

Cheers,

Frank