Whisper → Not used to speaking loudly (no response)
Speak louder → I heard my heart beating violently in this call.
Finally announced to the world loudly → mountains and rivers echo.
Conclusion: Yes, I am very important. Each of us should have the courage to say so. Let's hold our heads high and loudly announce to countless creatures on our beautiful planet that I am important.
The above analysis can be based on the idea of "how confident (courageous) you are to deal with it".
Of course, the best thing to write is "I am important". It is not difficult to write an argumentative essay, and it is not bad to make up a touching story. So that no one will say that you are beside the point. As for the last one, a teacher without analysis will think that you are beside the point.