number 3: Migration of people
The answer is 1, 3, 4 and maybe 2 but I'm not sure.
Answer:
The correct answer is C. Neutral stimulus: knock on the door; CS: knock on the door; UCS: cocaine.
Explanation:
According to Pavlov, an individual can <em>acquire</em> a certain behavior by relating it to various stimulus.
- At first, the knock on the door is considered a neutral stimulus, since it <em>does not trigger any certain response. </em>
- The cocaine is an unconditioned stimulus since at first it only generates Alexis's shakiness and heart pound.
- Once the <em>neutral stimulus </em><em>mixes </em><em>with the unconditioned stimulus,</em> the neutral stimulus (knocking on the door) becomes a conditioned stimulus since it will make Alexis nervous as she is expecting the dealer.
Answer:
because the river's annual flooding ensured reliable, rich soil for growing crops
Explanation: