Diction

“British imperial growth largely arose from 18th- and 19th-century foreign diplomacy and military conquest, which resulted in an aggregate of self-managing territories more closely related to the British Crown than to Parliament – e.g., Canada, the American colonies, India and Africa – although missionary activity and slave trade also played significant roles.”


I have to analyse the diction of this short passage but I can't seem to find a particular world field where the words are taken from. I would be glad if anyone could help me please.