Radio is communication over distance when sounds are converted to electromagnetic waves and sent to a receiver that transfers the waves back to sounds.
An example of radio is how people listen to music in their cars on their way to work.
Starts with bare ground and builds up from there. Coca-Cola, McDonald’s and Starbucks are great examples of US firms that have invested in Greenfield projects around the world (Irwin, 2012). That is a cross border investment where the parent firm builds from scratch and fully owns its subsidiary.