Could someone give me a rough idea of what to write/do,

Identify TWO specific means by which new expressions in popular culture are diffused globally.

Popular culture often spreads through a combination of different types of diffusion. Describe how terms, such as those shown in the table, diffuse spatially through each of the following processes.
-Relocation diffusion
-Contagious diffusion
-Hierarchical diffusion

When new words diffuse, they confront barriers. Identify and explain TWO barriers to diffusion that are often encountered even as new terms become more popular.