Answer:
Hunterer-Gatherer
Explanation:
A nomadic human living in a society where most food is found by foraging.
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>