I apologize for the confusion. The correct answer is "body composition." It refers to the proportion of fat, muscle, bone, and other tissues in the body, but it does not directly determine a person's weight.
rethink about heredity
Apologies for the misunderstanding. Upon re-evaluating, heredity can indeed play a role in determining a person's weight. Genetic factors can influence an individual's metabolism, body shape, and propensity for gaining or losing weight. Therefore, heredity should be included as a factor that can affect a person's weight.