Respuesta :
The answer is A.
The Type IIx or “fast” fibres created a high force output but had low endurance and are key to fast running or galloping.
The right option is; Yellow fibers
Yellow fibers are best suited for sprinting (a form of exercise in which an individual runs over a short distance in a short period of time).
Yellow fibers, are various proteins produced by fibroblasts and smooth muscle cells in the arteries. Yellow fibers are located in the extracellular matrix of connective tissue, and are characterized by high elasticity. Examples of yellow fibers include elaunin, elastin, and oxytalan, and they can be found in structures of the body such as lungs, veins, skin, connective tissue elastic cartilage, arteries etc.