It seems that you have missed the necessary options to answer this question, but anyway, here is the correct verb that would complete the sentence above. <span>The puzzled look on his face seemed a clear indication that he DOESN'T know the answer. Hope this answers your question. Have a great day!</span>
1/4th of current land, 1/100th of current population.
The answer to this question is <span>object permanence.
</span><span>object permanence refers to a mental understanding that an object is still stays in that place eventhough we stop observing it.
The ability for infants to understand the concept of object permanence started to develop when the infants enter the age of 4-7 months old.</span>
