Answer: The construction of trenches made it hard for either side to advance.
Explanation:
The statement that explains the reason why the western front turned into a stalemate during World War I is that the construction of trenches made it hard for either side to advance.
During World War 1, trench warfare was vastly used as it gives the soldiers protection from enemies. Soldiers were unable to cross the area that was between the trenches as the land was mined territory and also they were was subjected to gunfire, and artillery.
When America Fought in WWI and Became a Global Power. ... Swinging its industrial might and vast manpower behind France and Britain against Germany and its allies on April 6, 1917, the United States tipped the balance of the conflict and marked its own emergence as a global power
