I believe the answer is: Meso level
Meso level cultures refers to a society that includes more than one families within one same territory.
Examples of meso level cultures include things such as school setting, company setting, tribes, community, small village, etc.
I believe the answer is 5-7 years old.
Up to this point, the ability to store long-term memory has started to develop. This stage is very crucial for most parents because if the children does not receive proper accommodation during this period, it would be very likely that the children will grow up with learning disabilities.
The answer would be The Secondary Sector