The author's personal experience likely illustrates his main argument through the lens of how discrimination can profoundly impact one's ability to improve their life. By sharing personal anecdotes or struggles related to discrimination, he can highlight the obstacles faced and how these challenges hinder opportunities for growth or success. This supports the notion that addressing discrimination is crucial for enabling individuals to overcome adversity and make better lives for themselves. Therefore, the most fitting answer is:
"It demonstrates how discrimination can affect one's ability to make their life better."