Luke threw toys at his peers during free play. when the teacher caught him doing this, she would take the toy that he threw and put it in a box that he couldn't access for the rest of the day. his behavior decreased. this is an example of:

What the teacher has done is an example of negative punishment, where in she takes what Luke wants the most after Luke has displayed an action that he shouldn't have done. Negative punishments are being done in a way of taking what the person likes the most or desires after the person has committed things that he or she shouldn't supposed to do. This is shown above for the teacher took Luke's toy after seeing him throw it at his peers.