Because an area of land could support up to 500 times' as many people by farming as it could by hunting and gathering.
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The Fertile Crescent is basically where human civilization started. It stretches from Mesopotamia and across the Mediterranean coast to Egypt. Early civilizations depended on agriculture. To make agriculture, you need a river because it is a good water source to help grow your crops.
If you look at the map I have provided below, you will see that there are tons of rivers. This would make it very easy for settlers to grow crops. This means that sea tides and eroding mountains aren't the answer. I don't think the rivers were flooding and natural canals is an oxymoron because canals are artificial waterways, but this all should give you and idea.
Have a wonderful day! :D
The Hudson River is the river in new york state flows for several miles over surface bedrock that is more than 542 million years old. It was named after Henry Hudson who is an Englishman cruising and have explored it in 1609.
Answer:
The time will be "2 hours".
Explanation:
Around 10 km/hr, lava eruptions were travelling. The vents was just 15 km (9.3 mi) away Kalapana city as well as 20 km (12.6 mi) from Pahoa city.
So, we therefore need add the method, which would be: to taking out another time that civil defense officials just had to assess a city.
⇒ 
Thus, to measure the time spent throughout the community of Kalapana,
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The civil defense officers provide 1.5 hours of time each assess the city of Kalapana.
In order to measure the time spent in the towns of Pahoa,
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