What constitutes a "Weapon of Mass Destruction"?

A "Weapon of Mass Destruction" refers specifically to a device intended to cause mass injury or death, typically on a large scale. This definition aligns with the common understanding of such weapons, which include nuclear, biological, and chemical weapons designed to inflict significant casualties and widespread destruction. The focus is on the capability of these weapons to affect a large number of individuals and cause catastrophic harm to populations, infrastructure, and the environment.

In contrast, the other options do not meet this definition. A tool for peaceful resolutions is aimed at fostering diplomacy and conflict resolution, which is the opposite of what a weapon of mass destruction represents. A weapon intended to harm animals does not qualify as a weapon of mass destruction since it targets a specific group and does not have the capacity for large-scale impact on human populations. Lastly, a standard firearm used in law enforcement, while potentially lethal, is not classified as a weapon of mass destruction because its intended use is usually for enforcement and maintaining public safety rather than causing widespread devastation.