Answer:
Stanley's grandfather falling in love with Myra Menke
Explanation:
A flashback is a narrative device that is used to bring back past events to the present narration to make a link between them.
Therefore, the event from Chapter 7 of Holes that is a flashback is Stanley's grandfather falling in love with Myra Menke because it goes back in time to describe how Stanley's grandfather falls in love with Myra Menke.
Every adverbial clause begins with a subordinating conjunction.
Loch Ness monster, byname Nessie, large marine creature believed by some people to inhabit Loch Ness, Scotland. However, much of the alleged evidence supporting its existence has been discredited, and it is widely thought that the monster is a myth.