Answer:
set point theory
Explanation:
Set point theory: The term "set point theory" is described as a phenomenon that suggests that an individual's body weight is being regulated at a preferred or predetermined level through a "feedback control mechanism". However, in an adult, body weight is being maintained at some "relatively stable level" for quite a long period in time. In other words, it refers that an individual's body will fight to "maintain" a specific body weight.
In the question above, the given statement illustrates the set point theory.