Why is emotional stability important for a child?

Emotional stability is a part of the health triangle, which is a triangle that highlights the three major parts of general wellness. When the emotional stability of a child is interrupted, the potential for damaging the other two sides of the triangle (Social and physical) increases dramatically. 

If a child doesn't develop correctly in the emotional aspect, the child could grow up to live a troubled adulthood and isolation or depression. Seriously the quality of life would drop for that child.Hope this helps!