question: What sentence would provide a factual answer to this question: "All the plants in an area have died from a fire. Why would carnivores like foxes be less abundant as a result?"

answer: as the supply of food in an environment decreases , the population of animals in that environment will decrease

question: What sentence would provide a factual answer to this question: "Which animal might catch it's sustenance faster?"

answer: if an organism 's prey moves quickly then that organism may need to move quickly to catch its prey

question: What sentence would provide a factual answer to this question: "Where would the amount of water decrease most?"

answer:
evaporation causes amount of water to decrease