I don't quite understand the answer you gave.
The natural barriers around the Fertile Crescent are the deserts and the mountains.
The people that migrated in the Fertile Crescent, in what is known as Mesopotamia, moved in there because it was the only place that had nice conditions for living and prosper. The Mesopotamia region was between two very big rivers, the Tigris and Euphrates rivers. These two rivers were flooding each year and creating a new very fertile soil, which allowed the people to be engaged in agriculture and have a stable food source, and also to have a stable fresh water source.
On the other hand, the deserts and the mountains, were not providing these condition. The deserts are too dry, there's not enough food and water, and life is extremely hard and has to be in a nomadic style. The mountains are very restrictive in what they offer and in how big of a part of the year. While the summers might be good and provide nice living conditions, the winters are very cruel and can bring death very easily.
The land where he needed to build his canal was owned by Colombia and they would not allow it.
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be that they both believed in the "social contract," since this was an Enlightenment principle that allowed people to overthrow their government if that government became tyrannical. </span></span>
"Mel Gibson has said anti-Semitic statements in the past. This has tarnished his reputation greatly."
