A declarative sentence is a statement that ends with a period. It states facts or an opinion and lets the reader know something specific. All of these sentences were declarative.
<span>She screams.
"When Lennie explains that he likes to pet soft things, Curley's wife reveals that she too likes to feel silk and velvet, and she invites him to feel her hair, which is very soft. He does, but his big, clumsy fingers start to mess it up, and she angrily tells him to let go. As she tries to get her hair away from Lennie, he becomes scared and holds on more tightly. When she begins to scream, Lennie covers her mouth with his hand. A struggle ensues — Lennie panicking and Curley's wife's eyes "wild with terror" — until her body flops "like a fish" and then she is still."</span>
Foreshadowing is a writers (screen writers or authors) way of revealing an event that will take place in the future. Usually writers just give you snippets of what is going to happen. By doing that it helps make a story more exciting and creates an are of suspension. Hopefully I helped.