What is a parts to whole analogy? an analogy that you can touch because it physically exists an analogy that measures how big a whole object is and its parts an analogy that shows a relationship between a thing and its elements an analogy that cannot be touched

The correct answer is - an analogy that shows a relationship between a thing and its elements.
As the name itself says, a parts to whole analogy studies the relationship between parts of a particular thing and that entire thing. For example, the relationship between chapters and a book and songs and a CD - a book contains many chapters, just like a CD contains many songs.