A lake community with four trophic levels suddenly suffers from algal blooms. Using the strategy of biomanipulation, an ecologist may propose removing zoonplankton.
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Egypt and the people of the Middle East were protected by the desert as can be seen in the lack of attempts from foreign forces for invasion.
Explanation:
Ancient Egypt and the people of the Middle East, primarily Mesopotamia, had several advantages when it came to development and security. The people living in these places were living along the banks of the large rivers, such as:
- Nile River
- Tigris
- Euphrates
These rivers provided fertile deposits, water for drinking and usage, means of transport and traveling, thus the people of this places had excellent basis to develop.
On the other hand, it seems that these people had almost no problems when it came to invading forces outside of the region. The prime reason for this was that the region is dominated by hot, harsh deserts. The people outside of this region didn't dear to cross the deserts and attack, as the chances were that the armies will either die during the crossing of the deserts, or they would be so damaged that they would not achieve anything.
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The three regions are Melanesia, Micronesia, and Polynesia.
<u><em> When two plates move apart, the weaker part of Earth's crust moves down at normal faults where sediments are. deposited until a basin forms. At the area where two bent plates slide past each other, a depression forms where sediments are deposited.</em></u>
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