Introduction:
Transportation is the process of moving people, animals, and goods from one place to another. There are various means of transport that are used to carry goods from one place to another. In this case, goods are sent by ships, aeroplanes, and trains.

Explanation:
Here is a detailed explanation of why goods are sent by ships, aeroplanes, and trains:

Ships:
Ships are a commonly used means of transporting goods, especially when it comes to international trade. They are capable of carrying large quantities of goods such as raw materials, finished products, and containers. Ships are often used for transporting goods across oceans and seas, and they have the advantage of being able to carry heavy and bulky items. They are also relatively cost-effective compared to other modes of transportation, especially for long-distance journeys.

Aeroplanes:
Aeroplanes are another means of transport that are used for sending goods. They are particularly useful when it comes to transporting goods quickly and over long distances. Aeroplanes are capable of carrying perishable goods, high-value items, and time-sensitive goods such as medical supplies. They are also essential for delivering goods to remote or inaccessible areas where other modes of transport may not be feasible. However, it is important to note that air transportation is generally more expensive compared to other means of transport.

Trains:
Trains are an efficient means of transporting goods, especially for land-based transportation. They are commonly used for transporting goods within a country or region. Trains are capable of carrying large quantities of goods and can transport a wide variety of items such as agricultural produce, industrial goods, and consumer products. They are also relatively cost-effective, especially for long-distance transportation. Trains often have dedicated freight cars or containers to ensure the safe and efficient transport of goods.

Conclusion:
In conclusion, goods are sent by ships, aeroplanes, and trains as these means of transport are capable of carrying goods from one place to another. Ships are commonly used for international trade, aeroplanes are useful for quick and long-distance transportation, and trains are efficient for land-based transportation. The choice of transport mode depends on various factors such as the type of goods, distance, cost, and time constraints.