How do I demonstrate "how meaning is created" in my writing

[Befuddled]

So I am a little confused how I demonstrate in my writing how meaning is created. For example, there may be a rapper singing about his identity and uses various techniques. I think I can spot them but how should I write about them? 

I find it's a very important part because it is judged in many marking criteria from the FOA to the WT to the EE. 

Help please!