For several weeks, Allen had to clean the restroom at the restaurant where he worked. The task always made him nauseated. He has since gone on to another job, but still cannot walk by the door to a restroom without becoming slightly queasy. For Allen, the door to the restroom has become a(n) .

conditioned stimulus  

Explanation:  

In psychology, the conditioned stimulus is one of the influencing factors in the classical conditioning theory which was proposed by Ivan Pavlov in an attempt to experiment on dogs.

Conditioned stimulus refers to a formerly neutral stimulus which is responsible for triggering a particular conditioned response after getting connected with an unconditioned stimulus.

In reference to the question above, for Allen, the door to the restroom has become a conditioned stimulus.

    racial conflict and discrimination has existed ever since man learned to kill with rocks and bones. these conflicts arose from disputes between territory, power, wealth, religion, or simple difference. some of the most infamous racial disputes include slavery, the holocaust, and the civil rights movement.

    these listed disputes often resulted in casualties from all sides. riots, wars, imprisonment, and lynching are all commonly associated with racial conflict on severe levels.

      however, racism is an improving issue in recent decades. people are being more accepting and welcoming of diverse populations. though, the world isn't perfect and it will take much more time, if ever, until the world is rid of racism.

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!