Answer :
All these are firstly and mainly used in transportation.
*Waterways and Airways are used in transportation from one country to another mainly.
*Railways and roadways are used in transportation of one state to another.
*All are used in transportation of goods and not only people.
*Waterways and Airways are used in transportation from one country to another mainly.
*Railways and roadways are used in transportation of one state to another.
*All are used in transportation of goods and not only people.
road ways,rail ways,water ways,air ways are mainly used in transportation.road ways means the transportation on roads like buses,bikes etc.... these are useful to go to one city to another city rail ways are use ful to move from one state to another state.these also carry goods from one state to another state. water ways means transportation on water on ships these are helpful to move from one country to another it is very cheap mode of transportation. air ways are very costly but takes less time to travel and these are help ful to move from one country to another countries.