Answer:
They were both isolated nations. It would be nearly impossible for them to be attacked on their home front as they also controlled the waters.
Step-by-step explanation:
The United States and Britain were very fortunate in their geographical position on the map. This is because their distance from The Central Powers meant that they would have to gain naval superiority if they wanted to attack them at their homefront.
We can see that the issue with The Central Powers was that they had their enemies on all sides, and they were bonded together due to their positioning in central Europe. This is also the problem with the interception of the Zimmermann Telegraph and the sinking of the Lusitania, which eventually pulled the United States into the war.