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.