Kenny and his brother have nearly identical eating and exercise habits,yet Kenny is obese and his brother is very thin. The MOST LIKELY explanation for the difference in their body weights is that they differ in

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The question mentions that Kenny and his brother have nearly identical eating and exercise habits, which suggests that their exposure to foods and physical activity levels are similar. Therefore, the most likely explanation for the difference in their body weights is that they differ in their set points (the weight range that their bodies are predisposed to maintain) and metabolic rates (how quickly their bodies burn calories). These factors can vary between individuals and can affect weight regulation.

Kenny and His Brother Have Nearly Identical Eating and Exercise