question: What sentence would provide a factual answer to this question: "If substances are combined by pouring them together, they'll mix, such as"

answer: An example of combining two substances is pouring one substance into the other substance


question: What sentence would provide a factual answer to this question: "Which are all likely enabled by rock folding?"

answer: the Himalayas were formed by rock folding


question: What sentence would provide a factual answer to this question: "looking directly at an eclipse of the Sun causes harm to the"

answer:
looking directly at an eclipse of the Sun causes harm to the eyes