Final answer:
The radio taught Garnet about balancing two worlds by showing the importance of maintaining a harmonious equilibrium.
Step-by-step explanation:
The radio taught Garnet about balancing two worlds through the concept of separate-but-communal experiences. Similar to how TV or radio broadcasts brought people together to share real-time moments or discuss entertainment, Garnet learned to navigate between two different worlds by finding a balance, just like how people in their own homes were able to come together through the media. This allowed Garnet to understand the importance of maintaining a harmonious equilibrium between the two worlds.