Answer:
They could use it for emergencies.
Explanation:
If needed, they could call 911 and for help! it could be a big difference if kids did not have phones at school.
Korean society was strongly influenced by The Chinese model of society.
This is an example of people changing their environment, of influencing it, and in a way of interacting with it: the environment shapes us humans, too.
In geography, this falls under the theme of human-environment interaction.