Question

read the passage. then answer the question.
the main type of fighting in world war i was trench warfare. soldiers dug trenches, or deep holes in the ground, to protect themselves from enemy fire.
the area between the trenches of two opposing armies was called
o mans land.\ it was called
o mans land\ because it was not protected. if a soldier went there, the enemy could easily see him and kill him.
soldiers stayed in the trenches for weeks at a time. the trenches were dirty and uncomfortable. many soldiers got sick in the trenches.
why were trenches used during world war i?
trenches were clean places for soldiers to stay before returning to fight.
trenches made
o mans land\ a safer place to be.
trenches helped to end the war quickly.
trenches protected soldiers from enemy weapons.

Explanation:

The passage states that soldiers dug trenches "to protect themselves from enemy fire." This directly matches the reason for using trenches. The other options are incorrect: trenches were dirty (not clean), no man's land was unsafe, and trenches did not end the war quickly.

Answer:

Trenches protected soldiers from enemy weapons.