What was the greatest difference between the Harappan (Indus) civilization and the Chinese civilization

The difference between the Harappan civilization and the Chinese civilization was the geographical region.

Explanation:

China Civilization remains hidden from the rest of the world. They conducted trade internally. The geography of China helped the Chinese civilization to rise isolated from the outside world in culturally and economically. They became open to the flood that happened regularly. The availability of water with a suitable climate for growing crops made China emerge as a flourishing civilization with advanced art and science. The Indus Valley civilization flourished around the same time as civilizations in Egypt, Mesopotamia, and China. Presence of rivers like the Nile, Yangtze, Indus, Tigris, and the Euphrates assisted in survival and agriculture.

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.