Answer:
Deep-sea trenches generally lie seaward of and parallel to adjacent island arcs or mountain ranges of the continental margins. They are closely associated with and found in subduction zones—that is, locations where a lithospheric plate bearing oceanic crust slides down into the upper mantle under the force of gravity.
Explanation:
"The result is a topographic depression where the oceanic plate comes in contact with the overriding plate, which may be either oceanic or continental. If the overriding plate is oceanic, an island arc develops. The trench forms an arc in plan view, and islands with explosive volcanoes develop on the overriding plate. If the overriding plate is continental, a marginal trench forms where the topographic depression appears to follow the outline of the continental margin. Explosive volcanoes are found there too"
<u>Answer:</u>
<em>Because there is not enough evidence to prove just one theory</em>
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<u>Explanation:</u>
It is tough to explain the whole development of the earth together with some different theories. We don't know how long the whole universe will last or we don't know is there a probability for the universe to get extinct.
Everything related to universe is still mysterious and every theories which has been proved till today can be modified at any time because we know that the universe is expanding and we cannot state a stable theory for its origin. However, that depends on the future which we cannot define and it also modify the possible fate of the world.
d. Terrace farming enabled them to grow crops on mountain slopes.
e. Irrigation canals carried water from streams and springs to cities.
Explanation:
The Zapotec civilization is one of the oldest Mesoamerican civilization and it is a civilization that managed to exist fr several millenniums. It was located in the Valley of Oaxaca. The Zapotec people were among the most developed in the Americas and persisting for such a long time as a civilization is a good proof of it. Throughout the centuries and millenniums the Zapotec were in contact with the other civilizations in the region, so they managed to exchange lot of ideas and technology that benefit them a lot.
Because this civilization was thriving the population was growing more and more. Larger population means that more food is needed. In order to satisfy the needs the Zapotec started to perform terrace farming, as the mountain slopes were the only place left int heir territory for agricultural expansion. Even though the soil was not of the best quality the Zapotec managed to make a good use of this type of farming. Another method was the development of irrigation systems by creating canals from the streams and springs and bringing the water to the cities and to the farmlands.
