the difference between centralized and decentralized organization?, homework help

I want some one to explain me the difference between centralized and decentralized organization?

according to this quotation ” In centralized organizations, authority and decision making are generally performed by top-level executives. In decentralized systems, authority and decision making are generally found at lower levels of an agency’s hierarchy”.

no more then 1 page 12 point, times new roman font, double spaced

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