Causes severe malnutrition and famine.
a. war
b. poverty
c. population growth
d. regional trends

War causes severe malnutrition. Option A is correct.  

In addition to developed economies, drought and poverty, the violence of war also leads to severe malnutrition.

Because of war or conflict, people living in war-torn cities or countries have to flee, their plot of land or cattle were destroyed or stolen and the insecurity blocks people from going to the market.

Malnutrition refers to deficiencies, excesses or imbalances in a person's intake of energy and/or nutrients.

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.