Question

uswer in brief the following questions :
How are mummies' preserved?
Write a paragraph on the Pyramids.
How was 'Hwang Ho River China's sorrow?
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Answer 1

Answer:

I know only the second one answer that is:

hwang ho is a very famous river in China and it is really helpful and useful to people... but the river often cause floods that destroys the peoples home and their life cycle too