What concept best illustrates the ability to coordinate left and right arms in performing a task?

The concept that best illustrates the ability to coordinate left and right arms in performing a task is integration. Integration refers to the process of combining different components or skills into a coordinated whole. In this context, it emphasizes how both arms must work together smoothly and harmoniously to perform a task effectively.

For instance, when a child learns to throw a ball, they must coordinate both arms—one to throw and the other to support or balance the motion. This ability to integrate the movements of both arms is crucial for various activities that require bilateral coordination.

Other concepts mentioned, like cephalocaudal and proximodistal, describe patterns of development rather than the coordination of movements. Cephalocaudal refers to development starting from the head and moving downward, while proximodistal focuses on development from the center of the body outward. Differentiation involves the process of developing more specialized skills or movements. While differentiation may play a role in refining arm movements individually, integration specifically captures the essence of coordinating both arms together in a cohesive manner.