Final answer:
When placing a resident on a commode to defecate, you are helping them eliminate feces by assisting with Valsalva's maneuver.
Step-by-step explanation:
When placing a resident on a commode to defecate, you are assisting them in the process of eliminating feces from their rectum. Feces are eliminated through contractions of the rectal muscles, and you can aid this process by instructing the resident to perform a voluntary maneuver called Valsalva's maneuver. This involves increasing intra-abdominal pressure by contracting the diaphragm and abdominal wall muscles, and closing the glottis.