Earthworms are segmented, tube-shaped worms
belonging to phylum Annelida. These are habituating on healthy soils digesting
live or dead organic matter. The following are benefits of an earthworm to a
soil:
*Earthworms create water way systems, that is, water
can seep quickly into the soil, by digging burrows vertically.
*Earthworms forms lasting burrows or mingling the
soil with organic matter to make the soil more porous, thus, more oxygen to
help the plants’ roots.
*Earthworms reduce the firmness of the soil and
improve the cultivation of land.
*Earthworms consume organic matter as well as mix it
with the soil.
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Engaging in international trade- increase in foreign demand for goods.
Investing in physical capital- increase in production speed and quality.
Investing in human capital- increase in literacy rate
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<span>Babylon became an important center for trade because it had good population. It was a well-known place for trade because it was the capitol of Mesopotamia. Babylon produced a lot of goods such as wheat, parley, and sesame.</span>
Answer:
The Iranian Plateau is bordered by the Caspian Sea to the north, the Persian Gulf to the south, and the Zagros Mountains in the west.
Explanation:
The Iranian Plateau is located where Central Asia and Western Asia meet. It is the area between the Arabian and Indian plates with the Caspian Sea to the north and the Persian Gulf to the south. The Zagros Mountains border it in the west, while the Indo-Gangetic plains are the eastern limits of the plateau in Pakistan. It is also known historically as the Persian plateau. In antiquity, the region was known as Persia. The plateau is home to diverse wildlife including bears, wild boars, and leopards. Their habitat is largely the wooded mountain regions of the plateau. In the areas contingent to the Caspian Sea and the Persian Gulf there are marine fowl like gulls and geese. The wood from the forests on the plateau is used in making household items like doors and furniture and a lot of fruit is grown in this region.
The answer is: [D]: "<span>receives the usual or placebo treatment" .
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