Answer:Lucy has plagiarize or has committed plagiarism
Explanation:
Even though Lucy has changed few words but still this is someone else's idea .
When one takes something from the internet or from any other source which is written by someone else they should read it , try to understand the meaning and write it in their own words .
Even after one has written the information in their own words they still need to acknowledge that the idea was taken from someone else's work .
They will do this by citing the author within their writing and references will be written at the end of their writing .