Final answer:
The Natural Rights theory is expressed in America's foundational documents, such as the Declaration of Independence and the Constitution, through the recognition of certain unalienable rights, including Life, Liberty, and the pursuit of Happiness.
Step-by-step explanation:
The Natural Rights theory is expressed in America's foundational documents, such as the Declaration of Independence and the Constitution. In the Declaration of Independence, it is stated that all men are created equal and endowed by their Creator with certain unalienable rights, which include Life, Liberty, and the pursuit of Happiness. These rights are considered inalienable, meaning they cannot be taken away or denied. The Constitution also ensures the protection of these rights through the Bill of Rights, which states basic freedoms and protections for individuals.