Marla hides Ramy's favorite toy under a blanket while Ramy watches. Ramy removes the blanket and squeals when he sees the toy. Marla again hides the toy, but this time under a different blanket. Even though Ramy saw where Marla hid his toy, he still looks under the first blanket and not the second one. Ramy has displayed:

the A-not-B error Correct

Explanation:

The A-not-B error is also known perseverative error. It is known to be an error linked to mental perception. This is usually common in infants within the age range of 0-10 months, which shows that infants have not developed a permanent understanding of an object.

This theory was explained by Jean Piaget. He made it known that , this error usually occurs during the substage 4 of the infants sensorimotor stage. In this stage, the infants not yet,i.e, adjusting to fit new information and experience. At the stage also, the infant will begin to gain knowledge from the physical actions they perform.

In this case, Ramy is still at this stage, where he is still adjusting to fit new information and experience.

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.

the answer is:

c. economic output