Answer:
The way these lines indicate foreshadowing is by creating fear and suspense.
Step-by-step explanation:
These words clearly tell us that something is not quite right. They take us to a gothic environment, which can predict something dark where the reader feels suspense and fear.
The fact of entering a dingy tunnel, with little light cannot be a sign that something good is going to happen.
Remember that foreshadowing is a tool used by the author to give us clues about what may happen later in the story.