Which of the following best defines blunt trauma?

Blunt trauma is defined as an injury resulting from a force that impacts the body without causing penetration of the skin or underlying tissues. This type of trauma often occurs from collisions, falls, or being struck by an object. It typically leads to injuries such as contusions, hematomas, or fractures, which can be serious but do not involve open wounds.

The other choices reflect different types of trauma: sharp penetration is indicative of penetrating injuries, while a gunshot wound specifically refers to injuries caused by bullets, and a fall implies a mechanism of injury, but not all falls result in blunt trauma, as some could lead to penetrating injuries if the fall involves sharp objects.