What aspect of a child's health includes clear bright eyes and steady growth?

The aspect of a child's health that encompasses clear bright eyes and steady growth is appearance. This is because a child's appearance can provide visible indications of their overall health and well-being. Clear and bright eyes often reflect good hydration and a lack of illness, while steady growth signifies that the child is receiving adequate nutrition and care, contributing to their physical development.

In the context of child development, appearance can serve as an important indicator for caregivers and educators to assess whether the child is thriving physically. While energy level, activity, and appetite can also contribute to a child's well-being, they do not specifically capture the visual indicators that are associated with the concept of appearance. Hence, appearance stands out as the most relevant choice regarding the described characteristics.