Final answer:
Closed reduction is the procedure of manipulating a broken bone to set it into its natural position without surgery. In the case of a fracture of the greater humeral tuberosity, closed treatment with reduction would involve manually manipulating the broken bone to set it into its natural position without surgery.
Step-by-step explanation:
When a broken bone is manipulated and set into its natural position without surgery, the procedure is called closed reduction. Open reduction requires surgery to expose the fracture and reset the bone. In the case of a fracture of the greater humeral tuberosity, closed treatment with reduction would involve manually manipulating the broken bone to set it into its natural position without surgery.