Final answer:
Concerns about pollutants in the textile industry are mostly associated with dyeing and finishing processes that involve potentially harmful chemicals.
Step-by-step explanation:
The development of the textile processes that has led to concern about pollutants is primarily (c) Dyeing and finishing. While processes like spinning and weaving are central to textile manufacturing, it is the dyeing and finishing stages that involve a range of chemicals and treatments which can be harmful to the environment. Textiles require dyes, chemicals, and large quantities of water to be processed, which can lead to water pollution if not managed properly. These concerns are heightened with the scale that modern textile industry operates at, as evidenced by past pollution issues involving soot, filth, and toxic runoff from factories and related processes described during the Industrial Revolution era and beyond.