Final answer:
Age, height, and gender are factors that relate body composition to a healthy weight.
Step-by-step explanation:
The factors that relate body composition to a healthy weight include age, height, and gender. Age plays a role as metabolism tends to slow down with age. Height can influence weight as taller individuals tend to have a higher ideal weight. Gender also plays a role as men typically have more muscle mass and higher metabolic rates than women. Other factors such as birth order and bone length do not directly relate to body composition and healthy weight.
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