Answer:
C Stanley’s grandfather falling in love with Myra Menke
Step-by-step explanation:
A flashback is a literary technique that is used to show events that happened in the past to link up with present events in a novel or to bring in a plot twist
In the book "Holes", the event from chapter 7 that is related as a flashback is Stanley’s grandfather falling in love with Myra Menke as this is used to look back some years ago in order to connect with recent events in the book.