Final answer:
Farmers have been implicated as having a role in obesity due to their involvement in producing and marketing food.
Step-by-step explanation:
The group implicated as having a role in obesity is Farmers.
Obesity is the result of consuming more calories than expended, and factors such as genes, environment, socioeconomic status, and the physical environment contribute to obesity. In developed countries, the rise in obesity is influenced by various factors like changes in food consumption patterns and technological advancements that lead to a sedentary lifestyle. While scientists study the causes of obesity, farmers play a role in producing and marketing the food that can contribute to excess calorie consumption.