Which aspect of the Preamble addresses safety against external threats?

The aspect of the Preamble that addresses safety against external threats is providing for the common defense. This phrase acknowledges the government's responsibility to protect its citizens from foreign aggression and to ensure national security. It expresses the need for a collective defense mechanism, which is fundamental in safeguarding the nation against possible invasions or attacks.

In a broader context, this component conveys the importance of a unified military and defense strategy, emphasizing that the safety of a country is essential for the overall stability and prosperity of its people. This aligns with the founding principles outlined in the Constitution, where the security of the nation is prioritized to maintain peace and order for all citizens.