I'm pretty confident the answer to your question is drought.
Hope this helps!
Answer:
They faced scarcity of food.
Explanation:
In the home front, there was very litle food in the home form during World War 1.
Answer:
the treaty of Versaille
Explanation:
Article 231 of the treaty placed all blame for inciting the war squarely on Germany, and forced it to pay several billion in reparations to the Allied nations.
Answer: positive reinforcement
Explanation:
Positive reinforcement when someone has done something good in order to encourage them further a particular positive stimulus is given to that person .
This introduced stimulus increases that behaviour in such that the person will be more likely to continue doing it all over again .
Most parents use this strategy to reinforce positive behaviour in their children as this intensifies the great behaviour that has already been started.