Answer:
foot-in-the-door
Explanation:
Foot-in-the-door technique: In psychology, the foot-in-the-door technique is defined as a compliance tactic through which an individual tries to agree with the other person for a larger request by confronting him or her for a smaller request. It is also denoted as FITD.
Example: A boy asks her to play for an hour after studying, later on, the next day he asked to play with a friend for an entire day.
As per the question, the given statement represents the foot-in-the-door technique.