Final answer:
The name of the process is contraction, which is part of the sliding filament model of muscle contraction.
Step-by-step explanation:
The name of the process in which actin filaments slide, causing a shortening of an actin filament bundles is contraction.
This process is part of the sliding filament model of muscle contraction, which explains how muscle fibers contract.
The contraction is initiated by the binding of myosin to actin, forming cross-bridges that generate filament movement.