Graduate / "to adjust your behavior" - Best way to tackle this Supplemental Essay? [4]

So, I am quite stuck on one of my supplemental essay. I have no idea which topic I should focus on. Any help would be appreciated. Here is the question and I am applying for pharm school.

"Have you ever been in a situation where you thought you needed to adjust your behavior? How did you know and what did you do?"

Thanks!