Final answer:
Centralized organizational structure concentrates decision-making power at the top level, while decentralized structure spreads decision-making authority across different levels and departments.
Step-by-step explanation:
In a centralized organizational structure, decision-making authority is concentrated at the top level of management. This means that all important decisions are made by a few individuals or a single person at the top, while lower-level employees have limited decision-making power. On the other hand, in a decentralized organizational structure, decision-making authority is spread out across different levels and departments within the organization. This allows for more autonomy and decision-making power at lower levels, empowering employees to make decisions that affect their specific areas of responsibility.