Interestingly, the father of one of my former students had been in the business of providing donkeys to transport goods. As trucks and roads appeared, he started to move into the trucking business. His son, Lakew, saw this was clearly the future and grew the business into the prosperous transportation firm it is today.
All this carrying and transporting has a marketplace as its destination. In the rural areas, the bulk of buying and selling centers on grains, spices, clothing, and plastic bottles and containers which are essential for carrying water.