Which carries passengers and goods from one country to another on oceans?

We can reach any place easily by a :

To go to places far away, we may travel by:

Bullock cart are used as means of transport in :

Which is the mean of transport used in villages?

What can we do to keep the air clean?

What is common to all the means of transport on land?

 Bicycles, rickshaws, buses and cars are used to go from one place to another and they are known as:

How many wheels does a train have ?

Helicopters and aeroplanes are called :