Answer:
conditioned response
Explanation:
Based on the information provided within the question it can be said that Tobias's joyful reaction to the sad song can be classified as a conditioned response. This term refers to an automatic response that has been trained to occur to an specific neutral stimulus. Which in this case since the song was playing during a joyfull moment in Tobias's life then he has associated that song to joy even though it is a sad song.
