It shows that they will not feel alone because they have many friend who live together in the boarding school. So, they will not feel lonely.
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It shows that they will not feel alone because there are many children who are in boarding school. So,they can talk to each other with friend, they will not feel lonely.
It shows that they will not feel alone because there are many children who are in boarding school. So,they can talk or consult with friends in boarding school will make they not feel lonely.