Final answer:
Another word for function is purpose is true, hypothesis is closely related to suggestion, and the statement that a theory becomes a law over time is false.
Step-by-step explanation:
The word function can indeed mean purpose, validating the statement that another word for function is purpose as true. When it comes to the closest meaning to the word hypothesis, the most appropriate choice is suggestion because a hypothesis is a proposed explanation for a phenomenon that requires further testing. Lastly, it is false that a theory becomes a law when it has been known for a long time; a law describes universal principles, usually with mathematical formulations, while a theory is a well-substantiated explanation of some aspect of the natural world that can incorporate laws, facts, inferences, and tested hypotheses.