Final answer:
The excretory system includes the kidneys, bladder, and intestines among other organs, and is responsible for removing waste and excess water, thereby maintaining homeostasis.
Step-by-step explanation:
The correct statement about the excretory system is A) Key organs of the system include bladder, intestines, and kidneys. The excretory system is an organ system that removes wastes and excess water from the body. It includes several key organs, the foremost of which is the kidneys, which are responsible for filtering blood and creating urine. Urine is then stored in the urinary bladder until it is excreted through the urethra. Other organs in the excretory system include the large intestine, which excretes solid wastes from digested food, and the liver and skin, which also play roles in excretion by removing various waste products from the body. The excretory system plays a crucial role in maintaining homeostasis, the stable internal environment of the body.