Final answer:
Full hip extension and knee extension should be emphasized in lower extremity amputee rehabilitation to prevent the prosthesis from going into unwanted positions.
Step-by-step explanation:
In lower extremity amputee rehabilitation, the movement patterns that should be emphasized to prevent the prosthesis from going into unwanted positions are full hip extension and knee extension (Option 1). A prosthesis needs to mimic the natural movement of the leg, so focusing on achieving full extension at the hip and knee joints helps maintain proper alignment and stability.