What was the effect of the muddy trenches, according to this soldier

Based on the question above the answer is The muddy trenches from war starts to cause insects and rodents such as rats to come through and make living conditions harsh. Most of the time the mix of the weather and the muddy trenches makes your feet wet and cold. Over a long time in those conditions can make your body go into shock or Hypothermia. In war Soldiers would have benches to keep them out of constant mud every time they would walk around or shoot at the enemy

what the question i might be able to

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to