Which amendment allows for the right to assemble peacefully?

The First Amendment is indeed the correct choice because it specifically guarantees several fundamental rights, including the right to assemble peacefully. This amendment protects individuals' freedoms of speech, religion, press, assembly, and petition. The right to assembly allows people to gather for protests, parades, and other forms of collective expression without fear of government interference, as long as their actions are peaceful.

The other amendments listed do not address the right to assemble. The Second Amendment focuses on the right to bear arms, the Fifth Amendment addresses rights related to legal proceedings such as protection against self-incrimination and double jeopardy, and the Ninth Amendment confirms that the enumeration of certain rights in the Constitution does not imply that others do not exist. Thus, the clear connection of the First Amendment to peaceful assembly marks it as the correct answer.