Final answer:
The preamble of the Declaration of Independence requires that people must declare the reasons for their separation when forming a new country.
Step-by-step explanation:
The preamble of the Declaration of Independence states that people who wish to form a new country must declare the causes which compel them to separate from their former nation. Drafted by Thomas Jefferson, the document emphasizes the right of the people to establish a new government if the existing one becomes destructive to their unalienable rights of life, liberty, and the pursuit of happiness. The Declaration concluded that the American colonists must declare their independence from Great Britain and establish themselves as free and independent states.