The part of the muscle which shortens to create contraction is the-

Explanation

Actin filaments, usually in association with myosin, are responsible for many types of cell movements. The Interaction of filamentous actin with myosin forms the basis of muscle contraction During muscle contraction, each sarcomere shortens. • A sarcomere is the contractile unit of muscle cells composed of interacting myosin and actin filaments.