Why is preservation of city's old form required

uh I'm not completely sure because I'd need more information But I think it's important because it preserves the history and then future generations can look back and have a look at how life was for the generation who lived in it was.

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explanation:

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.