Which of the following rights is mentioned in the Declaration of Independence?

The Declaration of Independence articulates the foundational principles upon which the United States was established and emphasizes specific unalienable rights. Among these rights, "life" is explicitly mentioned alongside "liberty" and "the pursuit of happiness." This triad reflects the core philosophical beliefs of the Founding Fathers regarding individual rights that are inherent to all people and cannot be taken away.

While concepts like security, freedom of speech, and property are important rights in the context of American law and governance, they are not specifically cited within the Declaration of Independence. The focus of the document is on the more fundamental rights that establish the basis for individual freedom and government accountability to its citizens. Therefore, "life" is the correct choice, as it directly corresponds to the text and ideals expressed in the Declaration.