Final answer:
The predominant element of dense regular connective tissue is collagen fibers, which form parallel bundles providing tensile strength and resistance to stretching.
Step-by-step explanation:
The predominant element of dense regular connective tissue is B) Collagen fibers. This type of connective tissue consists of collagenous fibers that are packed into parallel bundles, enhancing the tissue's tensile strength and resistance to stretching. Examples of structures composed predominantly of dense regular connective tissue include ligaments and tendons. Ligaments may also contain elastin fibers, which provide the ability to return to their original length after being stretched, as seen in the vocal folds and ligaments between the vertebrae.