Why does a chair not collapse underneath you when you sit on it according to newton's third law?

According to Newton's third law, for every action, there is an equal and opposite reaction. When you sit on a chair, your body exerts a downward force due to its weight. In response, the chair exerts an equal upward force, known as the normal force, which supports you and prevents the chair from collapsing. The chair's structure is designed to withstand this force, allowing it to remain stable while you sit.