Disadvantages of this method: (Transportation of very heavy loads was beyond the ability of animals and people had to use many animals to transport their goods.

On the other hand, over time, the animals had problems and many of them They lose their lives in this way (for these reasons, little by little, with the emergence of various machines, this method became ineffective and other methods replaced it.

In the beginning, people carried their jobs to carry human goods so that they could support themselves and their families.

Today, there are still many people who work in this business and use their vehicles to transport human goods.

With the passage of time and the spread of technology, human beings have become more and more in need of people who can help them carry their burdens and be able to compensate for some of their hardships.

For this reason, the capitalists thought of forming institutions in which these institutions did their major work.