(1) and (4) are the correct ones. Your spacing is incorrect. It should be like this: 1.
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avid learnerShould I use "it" rather than "he" in #4 (Man realizes that it really needs ***.)?
AlpheccaStars We don't refer to men as "it."Even when I use "man" as mankind?
avid learnerShould I use "it" rather than "he" in #4 (Man realizes that it really needs ***.)?Man realizes that he really needs ***.
AlpheccaStarsMan realizes that he really needs ***.Thanks, I always a little bit confuse about the right pronoun for "mankind" and its variations.