What aspect does "zeal" highlight in a person's character?

"Zeal" underscores a person's intense and fervent passion or commitment to a particular cause or goal. It conveys a sense of eager and enthusiastic pursuit, reflecting an individual who is not just mildly interested but is instead deeply invested and driven in their endeavors. This term often implies an energy and vigor that propels someone to actively engage in activities that align with their passions, showcasing a proactive and motivated attitude.

The other choices denote a lack of engagement or a tepid level of interest, which do not align with the intensity that "zeal" embodies. Apathy, mild enthusiasm, and indifference suggest a disconnection or a low level of investment, contrasting sharply with the fervent dedication implied by having zeal.