The three modes of transportation are:
a) Land, water, and air

Explanation:
Transportation is the movement of people, goods, or animals from one place to another. It is an essential part of our daily lives and allows us to travel and transport goods efficiently.

There are various modes of transportation, each suited for different purposes and situations. The three primary modes of transportation are land, water, and air.

1. Land transportation:
- Land transportation refers to the movement of people, goods, or animals on the surface of the Earth.
- It is the most common mode of transportation for shorter distances and within cities or towns.
- Land transportation includes various vehicles such as cars, buses, motorcycles, bicycles, and trains.
- Cars and motorcycles are commonly used by individuals for personal transportation.
- Buses and trains are used for public transportation, carrying a larger number of people at a time.
- Land transportation provides flexibility and accessibility, allowing people to travel to different destinations conveniently.

2. Water transportation:
- Water transportation involves the movement of people, goods, or animals on water bodies such as oceans, seas, rivers, or lakes.
- It is primarily used for long-distance travel and transporting large quantities of goods.
- Ships, boats, and ferries are commonly used for water transportation.
- Ships are used for international trade, carrying cargo and passengers across different countries.
- Boats and ferries are used for shorter distances, such as crossing rivers or lakes.
- Water transportation is slower compared to other modes but is cost-effective for transporting bulk goods.

3. Air transportation:
- Air transportation refers to the movement of people, goods, or animals through the air using aircraft.
- It is the fastest mode of transportation, suitable for long distances and reaching remote locations.
- Airplanes are the main vehicles used for air transportation, allowing people to travel quickly between countries and continents.
- Air transportation is commonly used for business travel, tourism, and international trade.
- It offers the advantage of saving time and providing a comfortable travel experience.

Conclusion:
The three modes of transportation, land, water, and air, offer different benefits and are used based on the distance, purpose, and convenience. Each mode has its advantages and limitations, and their availability depends on the geographical location and infrastructure of a region.

Answer A) is correct because the three modes of transportation are Land, water and air ...
Explanation :
1) Land transportation are bus, car, train etc .
2) Water transportation are ship, boat, submarine etc .
3) Air transportation are airplane, helicopter etc .
So, they are called the three modes of transportation .