Advances in communications technology affected world war i by allowing for

The correct answer is "faster changes and planning in battle." Advances in communications technology affected World War I by allowing for faster changes and planning in battle. The big advantage that technology brought during the war is easy access and transfer of data and communication from one place to the other.

World War One, also called the Great War, was a time when a lot of new inventions took place and enabled scientists as well as generals and soldiers to witness the positive changes that were due to technology. These included "faster changes and planning in battle", these were, as said, mainly due to advances in communications technology.