question: What sentence would provide a factual answer to this question: "There is more carbon dioxide in"

answer: as the population of plants decreases , carbon in the atmosphere will increase

question: What sentence would provide a factual answer to this question: "Acid rain could effect"

answer: acid rain has a negative impact on water quality

question: What sentence would provide a factual answer to this question: "As the population of zebra decreases"

answer:
as the population of prey decreases , competition between predators will increase