Charissa's brother often pretends to listen to what she is saying, but he is really focused elsewhere. when charissa asks him, "what did i just say? " he can sometimes repeat her last few words. this is likely because of his memory

This is likely because of his "echoic" memory.

Echoic memory is the part of sensory memory utilized by the auditory framework. The term 'echoic' is gotten from the word 'reverberate', and alludes to the continuation of the sound or the tangible contribution from the sound-related framework.  

Echoic memory is equipped for holding a lot of auditory data, however just for 3– 4 seconds. This echoic sound is replayed in the brain for this concise measure of time quickly after the introduction of the auditory upgrade.

answer; (d) none of the above;