Which learning process occurs when organisms are able to distinguish between various similar stimuli and respond only to certain ones?
a. acquisition
b. discrimination
c. extinction
d. generalization

How did manifest destiny encourage westward expansion? a.) people thought their lives would be easier out west. b.) adding additional territories to the west meant more land and opportunity for settlers. c.) mexico did not want to give up texas to the united states. d.) it was more expensive to live in the eastern part of the united states.