<span>The precambrian period was a time period that happened billions of years ago. Actually, 4.6 billion years, to be exact. The Earth started to form during this period. Layers of rock, elements of the land and waters, and many other things were developed during this time. The atmosphere had a mind of its own, per se, during this time period. It went through many different changes. The atmosphere went from being extremely cold and galactic to warming and having volcanoes, which allowed for an expansion of life forms.</span>
A 2014 Reuters analysis found that, before 1971, water reached flood levels no more than five days every year (on average) in several U.S. east coast cities. Since 2001, however, that number has risen to 20 days or more (on average).
Africans were forced to work under terrible conditions on plantations, railways, and logging. In order to gain power, Europeans encouraged Africans to fight against each other…
Answer:
The Turkish Straits, the Caucasus, and the Urals and the Ural River
Explanation:
Normally the boundaries are natural geographic location. For the separation of Asia and Europe it is the Turkish Straits, the Caucasus, and the Urals.
