Briefly describe the answer of the following problem-

Problem- In 2008, it was estimated that 46% of children younger than five years of age in Southern Asia were underweight. The problem is ongoing and is due to poor breastfeeding practices, lack of food, poor-quality food, and inadequate water, sanitation and health services.

Part 1- Using the condition of being underweight; explain the interrelationship between health, human development and sustainability.

I need help to describe health, human development and sustainability.