Answer:
The colonies provided two things: some raw materials that represented a influx of capital for British entrepreneurs and industrialists to invest, and more importantly, provided one of the many markets that demanded the industrial goods that Britain produced.
On the other hand, the colonies did not provide much direct raw materials since most of the raw materials were available in Britain, mainly coal, which was by far, the main source of fuel. The labor force was also provided by British people, except for a few migrants.