Some did not have animals that could be domesticated around
them.
The Neolithic Revolution was critical because it signified
the transition to agriculture. It is believed that the civilization was driven
largely by environmental changes--a gradual warming that allowed people to
begin cultivating.
SPACE IS RIDDLED WITH WATER ESPECIALLY ON ASTEROIDS, THERE IS A POSSIBILITY THAT AT ONE TIME IN THE LIFELINE OF MARS THERE MIGHT HAVE BEEN AN IMMENSE AMOUNT OF WATER
It is B.response to chinese trade restrictions
