Why, with a lack of sunlight and poor unbalanced nutrition in young children, the skeleton is formed incorrectly?

Vitamin D is needed for the normal formation of skeletal bones. Vitamin D is found in animal products (fish oil, liver, chicken egg yolk, etc.) and can be produced in the skin under the influence of sunlight.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.