Asnake sheds its skin frequently.
this action is an example of a
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adaptation
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structural
functional
behavioral

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added