<human>:  In the Constitution of the United Kingdom, what is the difference between the House of Commons and the House of Lords?
<bot>: The House of Commons is elected by the people, and the House of Lords is appointed by the monarch. The House of Commons is made up of Members of Parliament, or MPs, who are elected to represent constituencies. The House of Lords is made up of members who are appointed by the monarch to represent the interests of the country.