Final answer:
Jennifer performed a motion known as abduction, where she moved her straightened leg away from her body's midline to close a door with her foot.
Step-by-step explanation:
When Jennifer swings her leg straightened out to the side to close a door with her foot, she is performing a motion called abduction. Abduction is the movement of a limb away from the midline of the body or the center of a limb. In this case, Jennifer's leg is moving away from the center of her body to create the necessary force to push the door closed.
This type of movement can also be seen in various activities and exercises, such as a side leg raise. Abduction is opposite to adduction, which involves moving the limb toward the body's midline, such as when standing from a spread-leg position to a feet-together stance.