Answer:
D. controlling such a large area
Explanation:
The area that's controlled by the Mesopotamian empires covered western Asia and Northern part of Africa. In 4000 BCE This was among the largest empires in the world .
Since there was no effective method of long distance communication during that time, managing this very large are was extremely difficult. In the end, many part of their regions were left unmanaged and fall to the attacks from other smaller empires or groups of barbarians.
Answer:
The widening channel of a river where it meets the sea, mixing fresh water and salt water
Answer:
Low levels of fecal coliform?
Explanation:
I'm not exactly sure but the water quality isn't really as sophisticated as much else.
The correct answer is Systematic observation
Systematic observation is a method used to understand how a particular activity or task works. The researcher observes the steps of a process, the tools used, the difficulties that appear, the conversations and results of the work.
Systematic Observation is guided by a defined objective, something you want to know about that activity. The observation is made repeatedly until there is sufficient evidence to state this.
Systematic Observation can be used to do Behavioral Mapping, Task Analysis or Activity Analysis.
