Solution:

Deficiency disease : a disease (such as scurvy) caused by a lack of essential dietary elements and especially a vitamin or mineral.

Rickets is the softening and weakening of bones in children, usually because of an extreme and prolonged vitamin D deficiency.

Kwashiorkor is a form of severe protein malnutrition characterized by edema and an enlarged liver with fatty infiltrates. It is caused by sufficient calorie intake, but with insufficient protein consumption, which distinguishes it from marasmus. Kwashiorkor cases occur in areas of famine or poor food supply.