Q: What occurs when muscle fibers get shorter?


Read this paragraph and choose the correct option from the provided answers:

Muscle contraction occurs when muscle fibers get shorter. Literally, the muscle fibers get smaller in size. To understand how this happens, you need to know more about the structure of muscle fibers.

 Choices:

- muscle extension

- muscle tension

- muscle diffusion

- muscle contraction


A:
muscle contraction