question: What sentence would provide a factual answer to this question: "If a young tern is found in a locked box, dead, without marks on it, a the most likely cause of death was"

answer: an animal requires air for survival

question: What sentence would provide a factual answer to this question: "What sort of habitat would living things live in?"

answer: when a habitat can support living things , living things can live in that habitat

question: What sentence would provide a factual answer to this question: "When producers create food in an ecosystem, a portion of the nutrients are"

answer:
a producer is a source of sugar in an ecosystem