I am not 100% sure but I believe that because of increased manufacturing, the air got very polluted and this made many trees darker, like birch. So moths are usually lighter in color so many couldn’t really hide among trees and they were eaten. After some time, many moths mutated and also became darker to blend in when they were on trees to prevent being eaten by predators. In conclusion, the population decreased.
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D) the nucleotide sequence in its DNA
Stream channeled flow of water,regardless of size
Yes, it is okay. you should never change your hypothesis if it was wrong.
