Final answer:
The House of Representatives used the British House of Commons as a model for its structure in the American government.
Step-by-step explanation:
The part of the structure of American government that used the British House of Commons as a model is the House of Representatives. The House of Representatives is the lower house of Congress and its structure, including the idea of elected representatives, was influenced by the British parliamentary system. It was designed to represent the people and their interests.
Learn more about Influence of British House of Commons on the House of Representatives