Which aspect of traditional magic focuses on effecting change through direct interaction?

The correct choice identifies contagious magic as the aspect of traditional magic that emphasizes effecting change through direct interaction. Contagious magic operates on the principle that things that have been in contact continue to influence each other. For instance, if an item such as a piece of hair or a personal belonging is used in a ritual, it is believed to maintain a connection to the person it belonged to, thus allowing the magician to influence that person's fate or circumstances. This direct interaction—through the use of physically connected items—signifies a strong, ongoing relationship between the object and the individual involved, making it a fundamental part of various magical practices across cultures.

While the other terms do have their own significance within magical or anthropological contexts, they do not involve direct interaction in the same way. Paleomagic relates more to ancient forms of magic or the mystical qualities associated with ancient objects. Fantasmagoria generally refers to an array of ghostly images or the illusion of a fantastic spectacle, which does not pertain to the direct influence aspect of traditional magic. Metaphysical magic involves broader concepts beyond the tangible interaction of personal items and influence, often focusing more on abstract principles rather than physical connections.