Answer: The correct answer is D. Definition 1
Explanation: I’ve answered this question before
Kinds of changes in travel foreseen in future and the impacts on the society human beings and environment
In the history of period there have been many changes in travel first man started travelling by walk and then he invented the wheels and this is the important point in history which marks the beginning of travel. He started to explore things and then the evolution changes and he started to travel to far places to explore things.
By the invention of airplanes travel took a different change in which he started to explore nations and he started to write about them. As changes in the mode of travel developed man also began to develop he started to learn from different cultures and from different nations.
Now evolution in travel has led him to the space by sending people to space and satellites to navigate. Thus travel has a huge impact on the society environment and the human beings
Its past, "have experienced" meaning they've already been through it
Answer is B already took the test and got it right
