question: What sentence would provide a factual answer to this question: "How essential is air for animals?"

answer: an animal requires air for survival
Problem: What is a random fact?

Answer: animals usually distance themselves from humans
Problem: Generate a sentence that contains a fact.

dead organisms are the source of nutrients for decomposers
Problem: Generate a sentence that contains a fact.
Sentence: a tree growing a tree-growth ring occurs once per year
Problem: Randomly generate a fact.

Random fact: the sun is a source of heat called sunlight
question: What sentence would provide a factual answer to this question: "A cactus stem is used to store what?"

answer:
a cactus stem is used for storing water