question: What sentence would provide a factual answer to this question: "An example of a flexible container could be"

answer: if a flexible container is pushed on then that container will change shape

question: What sentence would provide a factual answer to this question: "A monkey births live what?"

answer: a monkey births live young

question: What sentence would provide a factual answer to this question: "A person wants to use a ruler to measure something so they measure"

answer:
a ruler is used for measuring the length of an object