you have successfully explained meaning of slashing that what is this as well as you have also explain that it is not necessary for all blockchain to use this mechanism for giving punishment to their validators but mostly the blockchains that works on proof of stake mechanism use this mechanism

You have given a practical example of a blockchain that is using slashing mechanism I don't know complete explanation that how this blockchain use slashing mechanism but unfortunately you have also not going to its depth it would be more good if you explain it in a clear way but you have explained advantages and limitations of slashing

Overall you put your good efforts in your participation I wish you good luck and success in this engagement challenge in which you try to answer all the question in a best way but you need to go into more depth in some parts over all I wish you success