Answer:
This technique is called Foreshadowing.
Step-by-step explanation:
Foreshadowing is the literary technique where an author takes the liberty of advancing information that may (or may not) happen in the future of history. That is the author of a clue of what might happen, without making it clear what will actually happen. This technique is used to provoke the reader, leaving him curious and apprehensive about the upcoming information and situation discussed in the book, or in the text.