question: What sentence would provide a factual answer to this question: "The more factories and cars there are releasing gas in the air, the harder it will be to"

answer: as light pollution increases , seeing the stars will be harder

question: What sentence would provide a factual answer to this question: "When fish travel in the opposite direction of flow they are going to"

answer: An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs

question: What sentence would provide a factual answer to this question: "humans will have to flee if their home is"

answer:
shelter can protect humans from weather