Final answer:
Prince Edward Island is recognized as the birthplace of the confederation in Canada, where the Charlottetown Conference took place, leading to the unification of the colonies into the Dominion of Canada.
Step-by-step explanation:
The province known as the birthplace of the confederation in Canada is Prince Edward Island. In 1867, during the Charlottetown Conference, delegates from the colonies of British North America united to discuss the creation of a new country. While Nova Scotia, New Brunswick, and the Province of Canada (which later became Ontario and Quebec) initially joined to form the Dominion of Canada through the British North America Act, it is Prince Edward Island where the conference was held and the idea of unification took its first significant step. Despite this, Prince Edward Island did not join the Confederation until 1873, six years after the initial creation of the Dominion of Canada.