Final answer:
Television is the advertising medium with the widest global reach due to its widespread availability and ability to transmit messages to millions of viewers simultaneously, even during major global events.
Step-by-step explanation:
The advertising medium that has the widest reach on a global front is television.
Television reaches a wide audience due to its widespread availability, regardless of the geographic location. It can transmit messages to millions of viewers simultaneously, making it a powerful advertising tool.
For example, during global events like the FIFA World Cup or the Olympics, television advertisements can reach billions of people worldwide.
Learn more about Global reach of advertising mediums