Arctic is changing faster and more dramatically than any other environment on the planet because the ice that defines
it is melting with alarming speed, taking with it life that cannot survive anywhere else.A) it is melting with alarming speed, taking with it life that cannot survive anywhere else. - Correct, fixes the verb-ing modifier error, as verb-ing modifer explains the meaning needed to be conveyed by the sentence
B) it is melting with alarming speed taking with it life that cannot survive anywhere else. - Incorrect because of modifier error
C) it, melting with alarming speed, taking with it life that cannot survive anywhere else. - Fragment, no verb hence incorrect
D) them are melting with alarming speed, taking with them life that cannot survive anywhere else. - them is wrong antecedent for singular ice
E) they are melting with alarming speed, taking with it life that cannot survive anywhere else.- them is wrong antecedent for singular ice