What is it 5?

It is our possession. Most people possess only one of it. However, some people possess more than one, but some people possess none. Usually, its function affects us from birth until death. For most people, when they see it, feel it, or hear it, they’ll feel comfortable, warm, and satisfied. Hopefully, all people feel that they belong to it. We treasure it so much that we are ready to fight until death in order not to lose the passion of it. What is “it?”