Farming is a necessity for human survival. Without crops and foods not genetically made by man our bodies can't produce the nutrients and proteins it needs to function. Farming doesn't only effect people nutritionally wise, the hard work gives people's jobs and producing the food makes them money. So farming is a key aspect of human civilization both financially and nutritionally.
Answer: it was the state Chu who first built the wall. It was during the Qin Dynasty that the kingdom of Qin united the different parts into one empire.
New forms of transportation such as the steamboat and the railroad helped the nation expand trade. Meanwhile, innovations such as the modern assembly line and electric light bulb revolutionized both business and personal life
