World war 1 created more jobs especially in the military
        
             
        
        
        
The main reason for migration is mostly food: people migrate where they can produce food easily, catch it, or in modern times, to produce money to buy food. 
Other reasons is conflict with other people and competition for food: people migrate in the hope that elsewhere they won't have to compete. 
Finally, people might also migrate to look for a better climate (where they don't have to built very cold resistible houses for example).
        
             
        
        
        
Answer:
Affirmative Action regulation forbids employers to discriminate against individuals because of their race, color, religion, sex, or national origin in decisions regarding hiring, firing, compensation or other forms of employment.
 
        
             
        
        
        
Answer:Classical conditioning
Explanation:Classical conditioning is how we learn through associating environmental stimulus with certain responses. This is based on Behaviorism perpective , which is driven by learning through interacting with our environment and how that environment affect our behavior.
Classical conditioning occurs from a natural signal which triggers a natural reflex , natural signal being an unconditioned stimulus which triggers natural response. The neutral signal (previous neutral stimulus ) get associated with unconditioned stimulus and then it will become a conditioned stimulus which will trigger the same effect that is triggered by an Unconditioned stimulus.