Answer:
Greater manpower and resources and access to goods from their global empires/A more sophisticated understanding of propaganda and mass media as well as the tools to use it more effectively
Step-by-step explanation:
The main advantage that Allied powers had were the huge resources and manpower that allowed to create big armies and navies to support campaigns in Europe, North Africa and Asia in few years.
Both factions had the support of their civilian populations and sophisticated understanding of propaganda.
Although Axis powers had superior weapons and technology in comparison with the Allied powers, they lack of industrial base to produce them in quantity and did not have huge resources to sustain war production.