If possible I'd say all of them except the fourth one down (parts of ecosystems are independant) but if not I'd say the most valid one is the second one down (healthy ecosystems help animals)
They were expensive to produce or they were saving up food to send to the soldiers fighting the war.
Sir your asking what is it then it's essential to the conduct of warfare
1st The revolutionary situation; 2nd Social inequality; 3rd American rev. war
