Answer: Pets who learn that the sound of an electric can opener signals the arrival of their food illustrate: C.) classical conditioning.
Explanation: These pets have been experiencing Pavlovian Conditioning, this is the conditioning response of associating the (neutral stimulus) sound of the can opener with receiving food (biological stimulus).
The current form of American government is very flawed, but it is effective in the sense that it is capable of changing without revolution, which is the most important element of any government.
The concept of risk behaviour refers to a lifestyle/actions that placed people at a certain negative risk in order to get a certain positive reward.
For example, some people ill try to mount climbing on an extreme terrain in order to get an adrenaline rush. Another example would be someone who opened up a new business by risking the loss of his/her entire fortune.
It symbolized being democratic and was made available to everyone