Final answer:
The option that is not a division of loose proper connective tissue is D) Regular. Loose proper connective tissues include areolar, adipose, and reticular tissues, whereas regular connective tissue is a type of dense connective tissue with parallel collagen fibers.
Step-by-step explanation:
Among the options provided, D) Regular is not a division of loose proper connective tissue. Loose connective tissue, also known as areolar connective tissue, includes types such as areolar tissue, adipose tissue, and reticular tissue. These tissues serve various functions in the body including holding organs in place and storing energy reserves. Dense connective tissue, on the other hand, is more fiber-rich and is categorized into two types: regular and irregular. Dense regular connective tissue has tightly packed collagen fibers that are parallel to each other, which is not characteristic of loose connective tissue.