Electron transport chain <span>produces the most ATP</span>
The acidity of things does not influence on how bacteria spread. Bacteria can spread trough food, water and air though.
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The question is asking to state the group of animals that is warm blooded with hair or fur and also produces milk on their own, base on my research and further understanding, I would say that the answer would be Mammals. I hope you are satisfied with my answer and feel free to ask for more