I belive the answer to the first one is no I would have to assume a habitual zone is one area on a planet. for example, an air conditioned building vs. the Savvanah dessert. However I am not sure maybe other answers will help more on this one. Sorry.... Earth-like planet would of course need water, plant life, animals, oxygen, fossil fuels etc. A challenge we would face on a travel to another liveable planet: do we have engough transportation? engough fuel to make it? How long can we live on this planet? Who or what else is present here? etc. Yes I do think they should discover a planet with earth like qualities befor investing in tools to get us to them. So money is not wasted. (make sure to put this into your own words )
I believe the correct answer is C. The other answers give outside information that doesn’t correlate with the promoted question.
One movement that came to mind for me was the “Black Lives Matter” group and movement. The moment that group was created the government and F.B.I. thought of it as them becoming a security threat. I believe formations of those groups shouldn’t require approval, but rallies or parades should.