to travel
they are invented so people can travel around easier
Einstein's laws of physics suggest that time travel is only possible into the past as far as the point when the first time machine was invented. Ergo Time travel has not yet been invented.
The automobile was invented to speed travel between places
No. No one has invented time travel.
A fiction invented by writers
plane
They were invented in the order listed in the question.
Spaceships were invented so that people could travel and explore in the extreme environment called outer space.
Vladimir Raitz actually invented the package holiday, not Thomas cook, he was the founder of travel and tourism. I am a travel student and have researched this in great depth.
the bycicle
They invented the airplane.