Which type of change cannot be reversed

Changes that cannot be reversed are called irreversible changes

Example: if you cook an egg or if something goes bad. these changes can not be reversed.  

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

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