PLEASE HELP!! "Review pages 86–90.What do his efforts to explore the stratosphere tell you about Auguste Piccard?" BTW THE TEXT IS CALLED, "into the unknown:" above and below

Which statements are true about theme? check all that apply. themes are observations about life. themes can be stated in a sentence. themes and topics are the same thing themes are messages a text conveys about a topic examples of themes include loyalty, corruption, and greed. themes are rarely stated directly and need to be inferred by the reader.