In the revised sentence, an appositive is used to provide additional information about the noun "Pottery." An appositive is a noun or noun phrase that renames or describes another noun, providing more details about it. In this case, the appositive "items made of baked clay" gives a clearer description of what "Pottery" refers to.
The original sentence was:
"Pottery can be valuable or quite ordinary. Pottery consists of items made of baked clay."
By combining the two sentences and using an appositive, we get:
"Pottery, items made of baked clay, can be valuable or quite ordinary."
This revised sentence maintains the meaning of the original two sentences but presents the information in a more concise and connected way, using an appositive to add descriptive details to the noun "Pottery."