Answer:
The correct answer would be the digestive and excretory system.
The digestive system refers to the set of organs involved in digestion and absorption of nutrients in the body.
In humans, the whole process is usually divided into five steps; ingestion, digestion, absorption, assimilation, and excretion.
The excretory system includes a pair of kidneys, a pair ureters, urinary bladder, and urethra.
The main function of the excretory system is to excrete wastes through urine formation.