The answer to the question above is letter D. Establishing a society based on a cooperation and equal distribution of wealth according to Karl Marx and Frederic Engels would require a REVOLUTION. The era where the power driven machinery were began to develop and called to be the Industrial Revolution.
Our best estimate for the age of the universe is based on what we currently know about the universe's history is 13.772 billion years.
<h3>How to calculate the age of the universe?</h3>
There are two methods by which the scientists calculate the age of the universe:
By searching for the oldest stars
By calculating the rate of expansion of the universe and generalizing back to the Big Bang Theory.
Thus, Our best estimate for the age of the universe is 13.772 billion years.
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Rivers are part of landforms such as mountains, prairies and valleys. They can be part of different land forms a the same time.
