Answer:
Posttraumatic stress disorder is a mental disorder that one can develop after a traumatic event. The biological basis of PTSD is composed of chemical changes in the human body. If someone is undergoing PTSD they can do research to learn about it, and see what is actually going on to try and fix it. Ptsd wasn't talked about in the past but now as we as people have started to overcome things and change the ways things are, our society has changed the way things are looked at such as the ptsd. Still though some people who are not informed think ptsd is something only soldiers go through, but it's not. Ptsd is something that anyone can experience, you can be in a car accident, have a fight, a horrible sexual experience, etc.
Step-by-step explanation: