I would check in the references section of the report or the CVE listing or database associated with it. CVE listings provide definitions for publicly disclosed cybersecurity exposures and vulnerabilities. Its goal is easier to share data across separate capabilities with these definitions. CVE entries include identification number, a description, and at least a public reference.
fAnswer: A new source of high quality denim fabric
Explanation:
A shift from PPF1 to PPF2 would suggest a new improvement due to technology, innovation or raw material. Here a new source of high quality fabric would result in more and better production of fabrics.