By force. The Spartan soldiers would make annual raids/attacks on the Messenian Helots mainly to threaten them into submission, but also as military practice.
Answer:
The Sahara was a natural blocker
Explanation:
<span>Traditional
economic system' is such a complex phrase! It really needs to be
narrowed down some. Economic activity began with bartering, long before
there was money.
Heavy industrial machinery belongs to a manufacturing economy. We live in a so called post-industrial age.
As of now I would say the most frequently produced goods are derived
from petroleum. This includes the wide diversity of plastics, the dyes
that go into them, the nylon clothing and parts oil produces, medical
equipment, and, of course, computers. Petroleum is also used to produce
fertilizer for crops, and the fuel to harvest and ship them with.</span>
Source(s):
Modern times
9/11 was a series of four coordinated terrorist attacks by the Islamic group who was led by Osama Bin Laden.
