Simplify the following text for a Grade 8 native English-speaking person.
Original: The key difference between traditional post traumatic stress disorder ( PTSD ) and betrayal trauma is that the former is historically seen as being caused primarily by fear , whereas betrayal trauma is a response to extreme anger .
Simplified: Betrayal trauma is similar to post traumatic stress disorder . The difference is that post traumatic stress disorder ( PTSD ) is made by fear .