Answer:
copyright infringement.
Step-by-step explanation:
Copyright infringement is descried as the usage of copyright-protected material without proper permission from the copyright holder. Copyright infringement implies that the rights of a copyright holder, e.g. the exclusive use of a copyright-protected material for a particular period of time, are infringed upon by a third party. The two most popular forms of entertainment that suffer from significant amounts of copyright infringement are Music and movies.
The use of the melody of a song written by Pete without obtaining Pete’s permission by Mallory is a breach of copyright infringement.