Answer:
The idea that the oldest rock will always be the bottom layer of a series of rock layers is called the principle of superposition.
Explanation:
According to the law or principle of superposition, the sequence of layers of sedimentary rock go from the oldest, at the bottom, to the youngest, at the top. Sedimentary rock is formed when pieces of rock and even of living organisms - once they die, of course - are deposited on a surface. As time passes, new pieces are deposited on top of the older pieces. That process happens again and again until we have different layers of sedimentary rock, the first one being the oldest, that is, the one that was first deposited there.
<span>smoothness.
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Answer:Economists have had an enormous impact on trade policy, and they provide a strong rationale for free trade and for removal of trade barriers. Although the objective of a trade agreement is to liberalize trade, the actual provisions are heavily shaped by domestic and international political realities. The world has changed enormously from the time when David Ricardo proposed the law of comparative advantage, and in recent decades economists have modified their theories to account for trade in factors of production, such as capital and labor, the growth of supply chains that today dominate much of world trade, and the success of mercantilist countries in achieving rapid growth.
Explanation:
