I can explain Trench warfare and its effects on WW1

AN example of the environmental impact of trench warfare is seen by

Examples of environmental impact of Trench warfare are the erosion of soil and unexploded chemical weapons left behind.

Explain the disadvantages of Trench warfare

The disadvantages of Trench warfare are dysentery, Trench foot, rats, Contaminated food, death not from war, and living in tight spaces.

The best explanation of Trench warfare is

Trench warfare is a type of fighting where two sides dig trenches to fight from for protection.

Explain the effectiveness of Trench warfare

Trench warfare was not very effective because it caused a stalemate between the sides.

How did the use of trenches develop into a military strategy?

Trenches were developed out of the first Battle of Marne as a way to move troops to the front lines.