What occurs during bending of a structure?

During the bending of a structure, two force pairs acting at opposite ends play a crucial role. This process involves applying forces that create a moment around an axis, resulting in flexural stress on the material. This bending action induces compressive stress on one side of the structure and tensile stress on the opposite side, illustrating how the opposing forces work together to create the bending moment. This fundamental concept is essential in understanding how various materials respond to forces and is particularly important in fields such as biomechanics and engineering, where structures must be designed to withstand these bending moments without failure.

The other options do not accurately describe the mechanics at play during bending. Increased elasticity of tissue pertains to its ability to stretch and return to original form, which is not specifically a characteristic of bending; muscle soreness is a result of overexertion or injury rather than a direct consequence of bending per se; and while tension might act on one side, it does not encompass the complete mechanics of bending that involve both opposing forces.