Final answer:
Parental support of a child's weight loss effort is best indicated through providing nutrient-dense foods and supporting physical activity to ensure sustained healthy habits.
Step-by-step explanation:
The best outcome to indicate parental support of an obese prepubescent child's weight loss effort is b. Providing a variety of nutrient-dense foods. This approach emphasizes the importance of healthy eating in combating obesity. Restrictive measures like skipping meals can lead to unhealthy eating patterns, and criticism of the child's appearance is harmful to their mental health. Instead, supporting the child with nutritious food options and encouraging physical activity can help achieve a healthy weight in a supportive way. The Let's Move! campaign, initiated by former First Lady Michelle Obama, underscores the importance of healthy nutrition and physical activity in preventing childhood obesity and contributing towards a healthy lifestyle for children.