Final answer:
Ellie's specific activities in the story are not detailed in the provided information, but she does not seem to engage in the options given in the question based on the context clues.
Step-by-step explanation:
In the story 'Where Are You Going, Ellie's actions are not explicitly detailed in the information provided. However, based on the context clues and excerpts given, it seems that Ellie does not fit any of the described activities precisely. She is neither sitting in a car listening to a radio, playing video games at home, reading a book at the library, nor going for a walk in the park. Instead, the characters in the excerpts are engaging in various activities such as skipping houses on a route, recording videos near basketball courts, walking with mother, and relaxing by the sea.