What is defined as a sudden, violent eruption or discharge by a material acted upon with force?

The definition provided in the question refers to a phenomenon involving a sudden and violent release of energy, which correlates specifically with the nature of an explosion. An explosion is characterized by a rapid increase in volume and release of energy in the form of sound, shock waves, and heat, which aligns perfectly with the idea of a "sudden, violent eruption or discharge."

A flash fire, while also dangerous, is typically the rapid spread of fire over a surface that ignites combustible gases or vapors but does not necessarily involve an explosive release. Similarly, a detonation refers to a very specific type of explosion characterized by a supersonic shock wave traveling through an explosive substance, but not all explosions are detonations.

By including "all of the above," the correct answer encompasses various forms of explosive activity, which can be defined in a broader sense. Thus, acknowledging that both flash fires and detonations fit different contexts of sudden releases of energy allows for a comprehensive understanding of dynamic responses in materials under force.