Assertion:. All forms of transport are also referred to as lines of communication.

Reasoning: The invention of writing preserved messages and helped to make communication dependent on means of transport and the messages were actually carried by hand, animals, boat, road, rail and air

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

The correct answer is Option 1: Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Assertion:. All forms of transport are also referred to as lines of communication. This statement is true because transport systems help in the movement of people, goods, and messages from one place to another, thereby connecting different regions.

Reasoning: The invention of writing preserved messages and helped to make communication dependent on means of transport and the messages were actually carried by hand, animals, boat, road, rail and air. This statement is also true. In earlier times, communication relied heavily on transportation systems for carrying written messages.

Why R correctly explains A: Since written messages depended on transport systems for their movement, the same routes and networks used for transportation also became channels for communication. Therefore, all forms of transport came to be known as lines of communication.

NCERT: "The invention of writing preserved messages and helped to make communication dependent on means of transport. These were actually carried by hand, animals, boat, road, rail and air. That is why all forms of transport are also referred to as lines of communication."