They used animals, and other humans, including themselves - which we refer to as "walking".
Yes it was.
transportation
blood and lymph
The earliest forms of energy utilized by humans were likely fire, animal power (such as muscle power from domesticated animals), and wind power for sailing ships and windmills. These forms of energy were essential for cooking, transportation, and mechanical work.
dog,.,the were the first domesticated animals,.,They are used to carry heavy loads,.,It increases the potential power available for transportation
No
food, transportation, energy, and other stuff....
railroad
railroad
railroad
railroad
They give transportation to humans. They get you to places easily