In which tissue type is there a higher concentration of collagen fibers and less dense tissue?

The correct answer highlights the characteristics of dense connective tissue. Dense connective tissue is characterized by a high concentration of collagen fibers, which provide strength and structure. This type of tissue is composed of closely packed collagen fibers arranged in a parallel configuration, making it very robust and supportive, which is essential for areas that require tensile strength, such as ligaments and tendons.

The density of collagen fibers in dense connective tissue contrasts with the looser arrangement found in other tissue types, particularly loose connective tissue. Dense connective tissue does not allow for much interstitial space, resulting in a firmer structure.

While reticular connective tissue does contain collagen fibers, they are primarily arranged in a network that supports various organs, which is different from the high density and orderly alignment found in dense connective tissue. Elastic connective tissue also features a high proportion of fibers but includes a significant amount of elastin, making it more flexible rather than offering the same tensile strength seen in dense connective tissue.

Thus, the emphasis on high collagen fiber concentration and the strength of dense connective tissue directly supports why it is the correct answer.