The answer that will fill in the blank is the sensory memory. It is because it has the ability of retaining or remembering sensory informations that is being sent to the brain after the original stimulus has come to an end. It could be described above as Jill was able to hear what the teacher said after the teacher had uttered the words that he or she said, making her sensory memory work in order to retain the words that the teacher has told them.
