Final answer:
Ilocano dances demonstrate unity through their synchronous movements and harmonious musical arrangements.
Step-by-step explanation:
The characteristic or value that the Ilocano dances show, with inward movement and closer proximity to the center, as well as musical notes that stay close to each other, is unity. The synchronous movements of the dancers and the harmonious arrangement of musical notes create a sense of togetherness and cohesion. These elements demonstrate how dancing serves as a collaborative form of expression, fostering solidarity among the dancers and developing a shared love of music and dance.