The most significant aspect of the Declaration of Independence is that it stated the American philosophy of government. The Declaration articulated the principles of individual rights, government by consent, and the idea that people have the right to alter or abolish a government that does not protect their rights. This document served as a foundational statement for the United States' values and political system.
The other options, such as increasing the power of government, declaring rights for women and African Americans, or ending the American Revolution, are either inaccurate or misrepresent the document's purpose and effects. The Declaration did not increase government power, did not specifically address rights for women and African Americans, and while it was a key step in the independence movement, it did not directly end the American Revolution.