Should Americans still celebrate Christopher Columbus? Why or why not? ( Up to two paragraphs)

In hand stitched dreams which clue tells you that the historical period of the events will be important in the story

One day as your professor is driving to work, another driver runs through a red light and hits his car. the professor is shaken up but survives the accident. however, the next time he starts to enter the intersection,he becomes nervous and fearful. soon,he starts going to work via another route to avoid the intersection even though this route adds twenty minutes to his commute in each direction. according to the principles of classical conditioning, why does the professor become scared of the previously harmless intersection? what can he do about this, as going via other route is very time consuming? be specific. break down the situation into its parts and show how the principles of learning apply.

Dalton developed the first model of the atom that showed the structure of the inside of an atom