fast...
To travel
Nobody did, because there were no successful airplanes then
Because that's more efficient.
foot,wagon
Travel and or shipping things to other places.
Airplanes were invented because people wanted to fly like birds.
The invention of airplanes was so impotant because it could travel farther and faster and it became a new level of fighting in war.
Because it is light and strong.
Airplanes reduce travel time. and they are also a safer way to travel.
we have airplanes for transportation, aka moving from place to place. It is the fastest way to travel at the moment. Other airplanes are used as fighters, which means they are used for shooting other planes, or for dropping bombs.
Airplanes
Airplanes had expedited traveling and could travel over any terrain. Land, Sea, Mountain,etc...