Final answer:
Thomas Jefferson believed the unalienable rights to be life, liberty, and the pursuit of happiness, as stated in the Declaration of Independence.
Step-by-step explanation:
Thomas Jefferson believed that people are born with certain unalienable rights, which are fundamental and cannot be taken away by governments. These rights are listed in the Declaration of Independence, which he authored. According to Jefferson, the unalienable rights include life, liberty, and the pursuit of happiness. In line with Jefferson’s belief, and as reflected in various foundational documents, these rights are the essential natural rights that the government is created to protect.