Answer:
Explanation:
Early warning system of radar and observers
Royal Air Force (RAF)
Luftwaffe
Built more spitfires and hawkers
History cannot be recorded without writing.
Prehistory refers to the time before recorded history, and of course history cannot be recorded without the use of writing. Hence, prehistory is defined as the time before the advent of writing.
I believe the answer is Transportation Innovations
With what i dont understand