The correct answer is rhyme
Just imagine a generic poem that comes to mind. The endings are usually the same in some lines and it is said that they rhyme.
All this worksheet wants you to do is come up with the possesive noun using the given information.
Here is an example...
the painting created by Pablo Picasso ⇒ Pablo Picasso's painting
Answer:
The phenomenon, of large particles tending to rise to the top of mixtures while small particles tend to sink down, is known as the Brazil nut effect!!!!!
I would say we will make a lasting name for ourselves