Final answer:
To avoid hip dislocation after replacement surgery, the client should avoid crossing the affected leg when seated.
Step-by-step explanation:
The nurse teaches the client to avoid crossing the affected leg when seated in order to prevent hip dislocation after replacement surgery. Crossing the affected leg can put strain on the hip joint and increase the risk of dislocation. It is important to keep the knees together at all times and avoid bending forward when seated in a chair as well.