Which features formed natural barriers to expansion and invasion for china? select all that apply (there should be 3 choices from the list)
a)bay of bengal
b)gobi desert
c)himalayas
d)tien shan mountains
e)yellow river

The answers are B, the Gobi Desert, C, the Himalayas, and E, the Yellow River. These natural barriers not only hindered expansion and invasion into China from outside sources, but also they maintained an isolated society within the confines of these natural barriers.