Final answer:
To promote a healthier weight for children, allowing unlimited screen time is not advisable as it contributes to a sedentary lifestyle, which is linked to childhood obesity.
Step-by-step explanation:
Tonya is concerned about promoting a healthier weight for her children, and among the given suggestions, allowing unlimited screen time is NOT advisable. Limiting screen time is an important part of encouraging a physically active lifestyle, which helps to prevent childhood obesity.
It is well-acknowledged that a sedentary lifestyle, often associated with excessive screen time, contributes to weight gain and obesity in children. Instead, encouraging activities like regular exercise, limiting sugary drinks, and serving smaller portion sizes are positive steps toward a healthier weight for children.