Rami, a 2-year-old, and his mother are playing with a musical toy. Rami's mother shows Rami the toy and then hides it under a blanket. Rami has fun finding the toy under the blanket and then giving it back to his mother. After several rounds of this game, Rami's mother hides the toy behind a pillow instead of under the blanket. Rami will be MOST likely to:

the 4th option is the answer

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

the answer to your question is,

old stone age.

-mabel < 3

where are the choices