Harry and his family go to Mars in the future because of an Atomic War on Earth. Harry is afraid of the changes that are happening to the things around him and wants to go home. Harry then ends up adapting to his new environment.
Sometimes, change triggers fear. At other times, when humans can learn to accept the changes, they discover more advantages than disadvantages.
Futuristic Mars Colonization
"... million Earthmen on Mars. Big cities, everything."
Dark They Were and Golden-eyed By: Ray Bradbury
"Even the house. The winds's done something to it."
"Your life does not get better by chance, it gets better by change." -Jim Rohn
This quote suggest that future technology will make it so that we can live and colonize Mars.
The main character developes the theme the most because the main character is scared of the changes, but he ends up adapting with them.
This quote reveals that change can trigger Harry's fear.
This quote shows that they can't go back to Earth because of an atomic war, which triggers Harry's fear of change or adaptation.