One of the changes in development and specialization that did not happen in primitive mammals was the increase in stomach capacity. The specialization of teeth and the lower jaw are two important modifications of the primitive mammals. Also an increase in size and brain capacity are two crucial modifications of the early mammals.
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The answer (supposing that it is a metal pot) is:
b) conduction
because of the heat being conducted through the entire pot and spreading into the handle ❤
