Final answer:
Hardiness is described by three qualities: commitment, control, and challenge, all of which contribute to a person's resilience and success in life.
Step-by-step explanation:
The concept of hardiness is characterized by three key qualities: commitment, control, and challenge. Commitment refers to the ability to stay engaged with tasks and interests even under stress. Control indicates the belief in one's ability to influence events in their lives. The final quality, challenge, represents the perception of potential stressors as opportunities for personal growth rather than as threats. These aspects of hardiness contribute to a person's resilience and can significantly impact their ability to succeed in various life domains.