An example of foreshadowing that might be too obvious is announcing an event before it occurs. Like if this was a love story about if a struggling couple would get married, and the author foreshadows says something like "X booked the wedding at Naples", that's foreshadowing.
And now an example for something not foreshadowed enough; Like let's take the wedding example, and it ended with a phone call saying something like "I love your dog" and they just hang up, and the story ends. Like first, it was irrelevant, and second, that's not a cliffhanger or foreshadowing. So it's weak.
An analytical essay requires the presentation of an argument or claim by breaking down and examining the core components of an issue, idea, or works of art such as films, books, paintings.