What happens during a fracture?

When a fracture occurs, it signifies that there is a break in the continuity of the bone. This might happen due to various reasons such as trauma, stress, or underlying health conditions that weaken the bone structure. The critical point about a fracture is that it reflects a physical disruption in the bone, which can lead to pain, swelling, and an inability to move the affected limb properly.

In the aftermath of a fracture, the body initiates a healing process that involves several phases—such as inflammation, callus formation, and bone remodeling. The healing process is crucial for recovery but does not alter the fundamental understanding that during a fracture, the primary event is indeed the breaking of the bone itself. Thus, the focus on "the bone is broken" correctly identifies the occurrence of a fracture. The other choices refer to processes that might occur after the fracture but do not define what a fracture is in the first place.