Nutrients primarily come from detritus sinking from more productive shallower water.
<h3>Define detritus.</h3>
In contrast to dissolved organic material, detritus is dead organic material that is in the form of particles. Detritus typically consists of faces and the carcasses or remains of dead organisms. Communities of microbes that colonize and breakdown (i.e., remineralizer) detritus are frequently found in it. It is known as "soil organic matter" and is present in terrestrial ecosystems as leaf litter and other organic matter that is combined with soil. Organic matter that is suspended in water and accumulates in depositions on a body of water's floor referred to as "marine snow" when the floor is a seabed is referred to as detritus in aquatic ecosystems.
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The Amazon river rises in Peru, enters the sea in Brazil and at no point is crossed by a bridge.
The correct answer is - B. It became a democracy in the 1980s.
The country of Nepal officially became a democracy in the 1980's, and is still a country that proclaims itself as a democracy. Now we have to take into consideration that when a country proclaims itself like something it doesn't have to mean that it is true. So in Nepal we have a situation where officially there is democracy for around 4 decades, but the reality is that all of the governments have been practicing totalitarian regimes, people have been forced to do things that they don't like, the media is controlled by the government.
A bunch of Scandinavian warriors and merchants, who were actually called Varangians, started expanding into Russia during this time, subduing the local Slavic tribes & forming the Kievan Rus.
