Yes, children flying alone are a serious liability for an airline, and can be a great deal of trouble. Most airlines will seriously restrict what flights the child is allowed to fly, and can charge a great deal for monitoring and protecting the child en route.
Yes children can fly on airplanes accompanied by adults. They can also for a fee, travel as an unaccompanied minor.
To travel
Airplanes reduce travel time. and they are also a safer way to travel.
Airplanes
Airplanes had expedited traveling and could travel over any terrain. Land, Sea, Mountain,etc...
No, that's way before the invention of airplanes.
fast...
Airplanes are the fastest way to travel a long distance. - Over short distances, some trains may be faster
the traveled by chairs
It is blocked by air.
Very few people take airplanes on a daily basis. The overwhelming majority of the population ride in cars not airplanes. Air travel is limited to long distance travel.
travel really took off (pun intended)
the risks and benefits of airplanes are that you can travel practically anywhere and that you might die doing it