A more thorough explanation:

Channels

In the context of transportation, channels refer to the different routes or pathways that are used to move people or goods from one place to another. These channels can include highways, waterways, and air traffic.

• A truck driver may use a highway channel to transport goods from one city to another.
• A cargo ship may use a waterway channel to transport goods across the ocean.
• A passenger may use an air traffic channel to travel from one country to another.

These examples illustrate how channels are used in transportation to move people and goods efficiently and effectively. By utilizing different channels, transportation can be optimized to meet the needs of different situations and circumstances.