[Solved] Which of the following transactions is represented by the diagram below? A)An automobile salvage business holds weekly auctions at which it sells its entire inventory. B)A grocery store sells products to consumers. C)A hobbyist restores antique cars.When a car is finished,she sells it on Ebay. D)A firm sells movies to consumers through an online downloading service. Nephron: The structural and functional unit of the kidney. Kidney: A pair of organs in the urinary system that filter waste products from the blood and excrete them in urine. Microscopic Units: Small units of measurement typically used to describe dimensions of cells and microorganisms, not visible to the naked eye. Calyx: The cuplike division of the kidney pelvis.