Answer: Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use
Explanation:
Robert Gray explored the mouth of the Columbia River
Because he did not want his opponent to win
It was B.King Zoser
Hope i helped :)
An achievement of the byzantine empire was d) preserving Greek and Roman civilization. Although the Byzantine Empire preserved both of these ancient civilizations, it also created the divide where Eastern and Western Christianity were more developed. This included the separation between people who believed in venerating icons and people who believed it should be banned. There was also a rejection of paganism.
