question: What sentence would provide a factual answer to this question: "Advances in food transportation lead to"

answer: as ability to transport food increases around the world , the available types of food in distant locations will increase

question: What sentence would provide a factual answer to this question: "Seeing the stars will be harder when what happens?"

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

question: What sentence would provide a factual answer to this question: "Winter in the Northern Hemisphere"

answer:
December is during the summer in the southern hemisphere