The three factors that favour the cotton industry in Kolkata are :
(i) The coalfields are near the sources of power, e.g., Raniganj and Jharia.
(ii) Humid climate facilitates spinning.
(iii) Inexpensive labour from densely populated city.
(iv) Soft water from Hooghly river for dyeing and bleaching.
(v) Excellent port facilities for the import of machinery. (any three)