5 Sci Fi setting in Enders Game and why

Spaceship
They're more common in this book and sound normal.
Space
Ender lives in space for the majority of the book.
Sleeping area
The beds are locked by voice and hand print and have boxes with desks in them.
Battle room
The zero gravity area that can make people float around
Corridor
They lights, light up on the side of the corridor to show you where they have to go
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SPACE
Battle school
Laser Guns, Hand print locks, Gravity control, Sustainable life in space
Command school
COD
EARTH
Home
Futuristic Technology - Monitors, Desk computers
North Carolina - Juxtaposition
School
VIRTUAL
Internet servers
Chat rooms
Fantasy Game
Giants drink
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WHY DOES SETTING MATTER?
Gives info, Shows what genre, Creates story, Mood, Tone