Introduction:
The question asks about the fastest mode of transport among land, air, and water transport. The correct answer is option 'B,' which is air transport. In this response, we will explain why air transport is considered the fastest mode of transport.

Explanation:
1. Speed:
- Air transport, which includes airplanes and helicopters, is known for its incredible speed. Aircraft can travel at high speeds due to their ability to overcome gravity and move through the air.
- Unlike land transport, which is limited by road conditions and traffic congestion, and water transport, which is hindered by the resistance of water, air transport can travel in a straight line, covering long distances in a short amount of time.

2. Efficiency:
- Air transport is highly efficient in terms of time. It can transport people or goods over long distances in a fraction of the time required by other modes of transport.
- For example, a flight from New York to London takes approximately 7-8 hours, whereas traveling the same distance by land or sea would take several days or even weeks.

3. Accessibility:
- Air transport provides accessibility to remote or isolated areas that may be difficult to reach by land or water transport.
- It is particularly useful in emergency situations, where quick transportation of medical supplies, personnel, or relief aid is crucial.

4. Global Connectivity:
- Air transport enables global connectivity by linking various countries and continents. It allows people to travel to distant locations quickly, promoting tourism, business, and cultural exchange.
- It also facilitates the transportation of goods on an international scale, supporting trade and economic growth.

Conclusion:
In conclusion, air transport is considered the fastest mode of transport due to its high speed, efficiency, accessibility to remote areas, and global connectivity. It has revolutionized the way people and goods are transported, making the world more interconnected and accessible.