Answer:
learned response
Explanation:
learned response is the process by which stimuli lose their ability to evoke learned responses because the events that had followed the stimuli no longer occur.
The answer is fixed interval
I hope that helped
This is refered to as the chemical symbol. It is derived from the Latin name for the element which is why some elements like potassium (K) and sodium (N) have symbols different from their name on the periodic table.