Foreshadowing is when an author uses symbolism, an event, a small detail, or even a part of dialogue to be a warning or indication of a future event. An author might use this because they want to give the reader knowledge about a future event or to tease them.
According to the book “The Evolution of Useful Things”, the immediate cause of Richard Drew's work with cellophane was option three. It states that he desired to make his tape available in moist situations. This brought about the invention of masking tape and cellophane tape