During World War I, the zigzag pattern of trenches on the front lines was designed to provide a place from which to fire on the enemy.
supply soldiers with a place to store weapons.
protect troops from enemy fire.
shield machine guns from enemy attack.

C -Protect troops from enemy fire

During world war 1, the zigzag pattern of trenches on the front lines was designed to protect troops from enemy fire. The trenches were dug in a zigzag pattern instead of the usual straight pattern. In World War I, trenches were built in zigzag pattern with many different levels along the lines. In order to make sure there is movement for the soldiers, paths were dug between these levels.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.