Answer:
A. Raw materials
Step-by-step explanation:
Colonies were seen as a source of RAW MATERIALS for industrialization in the home country.
This is often referred to as Imperialism. And it is evident when British colonies the American colony by extracting raw material such as cotton, tobacco, and timber from the American colony for industrialization in faraway Britain.
This is also similar to how Spain extracted south America for raw materials to refine in Spain during the transatlantic slave trade or age of discovery.