Traits are important because some people learn quickly and others are better at retaining memories. Some people are shy and don't like talking to people, this is a characteristic that can be changed over time. Everyone can think of a time when they overcame a fear and that would be considered a change. I was once overcoming the fear of staying home alone with my family on vacation. I forced myself to overcome that fear by not going with them because I had a school I couldn't miss. I've been left home alone for two weeks and I know it doesn't sound that bad, but I've never been alone before. Diversity and universality can be explained in some way when talking about people. All people are different, but if you look closely you will find that we are more alike than we think we see. If you think about it, we all breathe air and there is blood pumping through our bodies. An example would be in the workplace when you and two colleagues are at work. You can make sure everyone does the job the same way and has the same quality of work. You can also find the best place in the queue for the person specialized for them