Which event from chapter 7 of holes is related as a flashback?
a. stanley’s shovel not making a dent on the ground
b. stanley jumping on the back of the blade with both feet
c. stanley’s grandfather falling in love with myra menke
d. stanley’s shovel fitting into the hole

The answer to the question above is "C) Stanley’s grandfather falling in love with Myra Menke" which is related to a flashback event from chapter 7 of Holes. This part of a story is taken from the "Holes" mystery novel written by Louis Sachar in 1998. In this event, Stanley's grandfather love story came as a flashback event.