Q: How can I use an elaboration sentence in writing?

Your question is unclear. It would be easier for me to answer your question if you could provide some context. Do you mean to say how you can use elaboration strategies in writing? Or do you wish to know how to use the word "elaboration" in a sentence?

Basically, elaboration means provding more specific details. So, if you have been asked to use more elaboration in your writing, you need to explain everything you have covered in your writing in greater detail. This will make your writing stronger and more impactful.