Answer:
<h2>Petroleum that is worthwhile extracting is usually found trapped in layers of permeable rocks by other layers of impermeable rock, but more recently reserves of gas and oil are being extracted from shale which is an impermeable rock but is porous in the sense that there are spaces (pores) within its structure in which ...</h2>
Answer: Debate and discussions on climate change are very important among scientists.
Explanation: Many scientific opinions have expressed in the form synthesis reports, by scientific bodies both national and international standing, and also by debate and surveys of opinion among climate scientists. The aim is to mitigate against climate change and creating awareness of the adverse effect on our enivornment.
Universities, scientists and laboratories contribute their quota to the overall scientific opinion through peer-reviewed publications, and the areas of collective agreement and relative certainty are summarised in respected reports and surveys carried out.
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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.
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By looking at all of the topographic maps given, the profile that best shows the topography along the line AD is going to be the first graph. This is the one that shows the best contour line elevations that are in feet. <span />