Final answer:
The Battle of the Atlantic affected both Germany and the Allies. It weakened Germany's ability to cut off supply lines to Britain and boosted the morale and position of the Allies.
Step-by-step explanation:
The Battle of the Atlantic during World War II had a significant impact on both Germany and the Allies. For Germany, the victory of the Allies meant that their attempts to cut off the supply lines to Britain were unsuccessful. This weakened their position and hindered their ability to sustain the war effort. On the other hand, the victory of the Allies ensured a steady flow of supplies and reinforcements, boosting their morale and strengthening their position.