An actress experiences ever-increasing levels of acclaim following each successful movie role. Yet with each success, she experiences only a temporary surge of subjective well-being. This is best explained in terms of:

Adaptation-level phenomenon is the correct answer.

Explanation:

The answer in the space provided would likely be in the person's life span, it is likely that the person will be nearly unwavering and steady. It is because when emphasizing stability, it means that the person is in the state of being still or he or she is stable or consistent. That is why the person would likely be unwavering and steady in terms of how he or she goes on his or her life.