Witch part of the triangular trade system represents the location where the trade process originated

The Triangular Trade involved three places between which the trade and voyages occured.

England to Africa

Africa to America

America back to England

The 13 colonies provided the the raw material and natural resources. The manufacturated products were from England and Europe, and the slaves that worked in Slave Plantations came from west Africa. The British part was the first to run the Triangular trade route, with John Hawkins, who first started the British slave trade.

the answer is  loss : )