The virus was very successful at reproducing quickly in it's natural habitat: the human brain.
In this sentence, "the virus" is our subject. "Virus" is an ungendered third-person noun, so its proper possessive pronoun is "its." Watch out for it's: that is a contraction of "it is."
940 MCQ for effective preparation of the test of Nouns and Pronouns of English Grammar section.
Read the MCQ statement: The virus was very successful at reproducing quickly in it's natural habitat: the human brain., keenly and apply the method you have learn through the video lessons for Nouns and Pronouns to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 166-4445.