Final answer:
The movement that brings the fingers or toes together is known as adduction, which is the opposite of abduction.
Step-by-step explanation:
The action that brings the fingers or toes together is called adduction. This movement occurs within the coronal plane and involves bringing a limb or appendage toward the midline of the body or across it. Adduction contrasts with abduction, which moves the limb laterally away from the midline. In the context of fingers and toes, when we spread them apart, we are performing abduction, and conversely, when we bring them together, it is an instance of adduction.