Do solved and unsolved numerals

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answer; i believe that the correct answer is (d) a very small amount of mass

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.