Answer:
genetic factors, including the FTO allele, can influence an individual's predisposition to obesity, it is unlikely that the increase in obesity rates between 1980 and the present can be solely attributed to changes in the proportion of the population with the FTO allele. Obesity is a complex condition influenced by a multitude of factors, including genetic, behavioral, and environmental factors, and changes in obesity rates are likely driven by a combination of these factors.
Step-by-step explanation: