Final answer:
During the terminal stance phase of gait, the pelvis moves into posterior tilt as the hamstring muscles contract. This movement is necessary for proper gait mechanics as it propels the body forward.
Step-by-step explanation:
The pelvis moves into posterior tilt during terminal stance phase of gait, which is option C) Terminal Stance. This is the phase of the gait cycle where the body moves over the supporting foot as the other foot begins to swing forward. A posterior pelvic tilt involves the movement of the pelvis where the front rises and the back lowers. This movement is essential for proper gait mechanics and is opposite to the anterior pelvic tilt position that occurs when the pelvis is in a neutral alignment.
The pelvic girdle plays a crucial role in maintaining balance and support for the upper body. During the terminal stance, the hamstring muscles contract, pulling the pelvis into posterior tilt, helping to propel the body forward as it prepares for the next phase, which is pre-swing.