Final answer:
The lymphatic collecting ducts and veins share common features, such as endothelial cells and valves, but the transportation of chyle is unique to lymphatic collecting ducts.
Step-by-step explanation:
The correct answer is c. Transport of chyle.
Both the lymphatic collecting ducts and veins share several common features. They are both composed of endothelial cells and have valves that prevent backflow. Additionally, the anatomical distributions of both these vessels may vary between individuals.
However, the transportation of chyle is a unique feature of lymphatic collecting ducts. Chyle is a milky fluid that contains lipids and is absorbed from the intestines during digestion. It is transported through the lymphatic vessels, specifically the lymphatic collecting ducts, before being dumped into the circulatory system via the subclavian veins.