How did environmental factirs such as soil determine difference between north and south

Because of better soil in the south, the south was much more  focused on agriculture than the north is the correct answer.

Explanation:

Walls, canals, and roads helped unite China. So, too, did Shi Huangdi's program of standardization. Standardization means making all things of a certain type alike. The use of standardized coins, weights, and writing helped make trade and communication easier throughout China.