Answer:
To indicate that Blanca Flor will use her magic to escape.
Step-by-step explanation:
Foreshadowing is a literary technique used by authors and writers to provide a sense of what is to come in the next scenes. It acts as a source of hints or ideas for future events.
In Blanca Flor, the girl Blanca Flor spat three times into the fire which will help them in their time of need. This act foreshadows her decision of running away from Don Ricardo and saving Juanito. The spit is part of her magic which will help them (as we shall see in the next scenes) whenever Don Ricardo calls her name.
Thus, the correct answer is she will use her magic to escape from Dn Ricardo's captivity.