Answer:
Allied: the United Kingdom; Central Powers: Germany
Step-by-step explanation:
Central Empires or Central Powers is a designation attributed to the coalition formed between Germany and Austria-Hungary during World War I, which would join the Ottoman Empire and Bulgaria.
The Axis Powers, also known as Axis Alliance, Axis Nations or Axis Only, were one of the belligerents of World War II. His enemies were the Allied forces.
According to the image, the countries that spend the biggest amount during the war were German (central powers) and the United Kingdom (Axis Powers).