What effect did an isolated environment have on marsupials? * 1.It made the koala become the most famous and popular marsupial.
2.Marsupials spread all over the world so that they could survive.
3.There are now many different species of marsupials in Oceania.
4.It caused meat-eating marsupials to become extinct.

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the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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the answer is a for sure mark brainliest i had got this right on usatestprep