​The set-point concept assumes that

A) ​people have a kind of internal thermostat that regulates weight.
B) ​gaining weight is a significantly easier process than losing weight.
C) ​losing weight is a somewhat easier process than gaining weight.
D) ​a person's weight has no relationship to any hereditary component.

The set-point concept assumes that people have a kind of internal thermostat that regulates weight, meaning that our bodies will attempt to maintain a certain weight range despite efforts to lose or gain weight. This concept suggests that weight is regulated by physiological processes rather than simply being a matter of willpower or behavior.