You are presented with the question "What contracts as it gets shorter?" and the following answer choices: 
- layers of fat
 - Epidermis
 - Veins and arteries.
 - Shortstop
 - Labor
 - Contracts
 - the body's largest organ
 - Bundles of fibers

Now knowing that muscle contraction occurs when muscle fibers get shorter and muscles are bundles of fibers that can contract, choose the best answer.


 

        Bundles of fibers 