Concept:The Bowman’s capsule is the start of a nephron and is located in the outer region of the kidney.Explanation:Each nephron begins as a cup-shaped Bowman’s capsule.These capsules are found in the outer layer of the kidney, known as the cortex.The medulla, pelvis, and pyramids are deeper structures and do not contain Bowman’s capsules.Therefore, the kidney layer that holds Bowman’s capsules is the cortex.Answer:A. cortex