The economy is to define it according to primary, secondary and tertiary sectors.
Primary
Sectors<span><span /></span><span><span>Mining and Quarrying </span></span><span /><span><span /></span><span><span>
</span>
<span>
Agriculture, Forestry and Fishing
</span>
<span>
Secondary Sectors
Manufacturing
</span>
<span>
Electricity, Gas and Water (utilities)
</span>
<span>
Construction
</span>
<span>
Tertiary Sectors
Finance, insurance, real estate and business services
</span>
<span>
General Government
</span>
<span>
Wholesale, retail, and motor trade; catering and accommodation
</span>
<span>
Transport and communicationsHope it helps
</span></span>
<span>Trade was important to the Sumer because there certain
resources that the Sumerians didn’t have.
These were stone, wood and metals like copper. Due to this lack of resources, the Sumerians
establish trade with other tribes as well as merchants. One is when inhabitants of the Zagros and Taurus
mountains bartered traded timber, limestone, gold, silver and copper with the
Sumerians. The Sumerians gave them wheat
and barley in exchange. Apart this,
boats were developed enabling them to transport goods for trade.</span>
The lithosphere is the outermost sphere of the solid Earth, consisting of the crust and the upper part of the mantle. The lithosphere is largely important because it is the area that the biosphere (the living things on earth) inhabit and live upon.
If it weren't for the tectonic plates of the lithosphere there would be no change on Earth. Tectonic plates shift due to convection currents lower down in the mantle, and this can cause the formation of mountains, the eruption of volcanoes, and earthquakes. While this can be devastating in the short-run, long term benefits are the formation of new plant life, the creation of new habitats and encouraging adaptation.
It is also the source of almost all of our resources, and is rich in elements like iron, aluminium, calcium, copper and magnesium, which humans have used for tools and machinery for millennia.
When the biosphere interacts with the lithosphere, organic compounds can become buried in the crust, and dug up as oil, coal or natural gas that we can use for fuels.
In combination with the atmosphere and hydrosphere (water), it provides a stable source of nutrients for botanical life, which produce glucose that higher organisms use for sustenance.
The largest SAND desert is the Sahara Desert. It is located in North Africa :)