give at least one instance of your life where you are a doer of an action that is beneficial to other people in your society​

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not only is it colder, it also becomes darker, less salty, and more dense.

cells spend most of their time in interphase

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.