How did trench warfare style of battle result in a prolonged stalemate?

Answer

The trench warfare resulted in a prolonged stalemate because neither side gained much ground.

Q:What is trench warfare? A:Trench warfare is a type of land warfare using occupied fighting lines consisting largely of trenches, in which troops are significantly protected from the enemy's small arms fire and are substantially sheltered from artillery.
Q:Why did trench warfare result in a prolonged stalemate? A:The trench warfare resulted in a prolonged stalemate because neither side gained much ground. Both sides had dug trenches and fortified them. The opposing sides tried to go over the top and take the enemy's trenches, but both sides used barbed wire, machine guns, and artillery to prevent each other from doing so. This made it extremely difficult for either side to make significant advances.