Decentralization can be defined as having authority or the decision-making power on every level rather than a single unit.

Centralization can be defined as a system that revolves around a single unit. That unit has the ultimate power to control everything from top to bottom levels.

good defination

Decentralized systems are more secure because the data in ledgers are secured with cryptography and data in each block requires the data of a previous block for validation. But this is not the case in Centralized systems, they can be hacked and misused as whole data is saved at one central unit.

good

in last question you did not explain that which coin you are going to check , and you did not not share contract address of coin ,

you explained the rest of question very well , and thank you very much for the taking participate in the class

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