What does "stamina" relate to?

The term "stamina" refers to the strength and endurance needed to sustain prolonged physical or mental effort. It captures the idea of perseverance and the ability to keep going, especially when faced with challenges or fatigue. In various contexts, whether in sports, academics, or other activities, having stamina means that a person can maintain their performance over an extended period rather than succumbing to tiredness or difficulty. This understanding makes it clear why choosing the option related to "the strength to keep going" accurately reflects the essence of stamina.