Final answer:
Gout is a form of arthritis caused by the excessive production of uric acid, resulting in the deposition of uric acid crystals in joints. The correct answer is D) Uric acid.
Step-by-step explanation:
Gout is a form of arthritis that occurs when the body makes too much uric acid or the kidneys do not properly excrete it. It results in the deposition of uric acid crystals in body joints, causing inflammation and pain. The excessive production of uric acid is often caused by factors such as enzyme abnormalities or decreased excretion in conditions like renal failure. Therefore, the correct answer is D) Uric acid.