The Oregon trail begin in Missouri and ended in Oregon
The answer is the Bystander Effect.
The bystander effect occurs when the presence of others discourages an individual from intervening in an emergency situation, they assume someone else has or will help. Social psychologists Bibb Latané and John Darley popularized the concept following the infamous 1964 Kitty Genovese murder in New York City.
I believe the answer is: <span>Learned helplessness
</span><span>Learned helplessness refers to the feel of helplesness that created by exposing an individual to a negative situation for a long period of time, to the point where they perceive the negative situation as something that 'normal' or 'supposed to happen'</span>
The process by which new information displaces older information in short-term memory could explain why someone, for example, could remember a phone number and suddenly he or she will forget the last three digits of the number. In order to avoid this, we can enhance our short-term memory skill by chunking or having a rehearsal.