Dr. Rubio is conducting an experiment in classical conditioning. Shortly after playing music, she places a loaf of bread on the window sill outside her office window. After doing this a number of times, she notices that now, just as she begins to play her music, several birds fly to her window even before she presents the bread. In this example, what is the conditioned stimulus

nigger, that word was originated for white folks   to keep black people under

and when black people use it, they know that's just how they greet each other

and when white folks use it, they know there's a double meaning under

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.

answer; no longer than a reasonable period of time;