The answer to the question “Home : Shelter :: School : ?” is Education.
A home is a place where people live and feel safe. It is a place where they can relax and be themselves. A shelter is a place where people can go to escape from danger or bad weather. It is a place where they can find food and water and a place to sleep.
A school is a place where people go to learn. It is a place where they can learn about different subjects and develop their skills. Education is the process of learning. It is the process of acquiring knowledge and skills.
The relationship between home and shelter is similar to the relationship between school and education. A home is a place where people can feel safe and secure, just like a shelter is a place where people can escape from danger. A school is a place where people can learn and grow, just like education is the process of acquiring knowledge and skills.
The other options are not correct because they do not have the same relationship to school as shelter has to home. A principal is a person who is in charge of a school. A student is a person who attends a school. A class is a group of students who are taught together. Education is the process of learning.