Low dissolved oxygen concentrations that occur in many bodies of water when nutrients stimulate the growth of algae that subsequently die and are decomposed by oxygen-using bacteria.
Answer:
In 1849, Californians sought statehood and, after heated debate in the U.S. Congress arising out of the slavery issue, California entered the Union as a free, nonslavery state by the Compromise of 1850. California became the 31st state on September 9, 1850. ... California situated its first capital in San Jose.
The northern boundary was set along the 42nd parallel. The southern boundary had already determined by the Treaty of Guadalupe-Hidalgo with Mexico. The northeast corner of the state would be the point where the 42nd parallel met the 120th meridian, to include the Sierras.
Explanation:
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Overcrowding and slums developed in many impoverished countries in the 20th century, mostly due to large migrations to cities from people looking for work.
The correct answer would be D. The oceans of earth doesn’t have anything to do with the surface of the earth except affect it. The definition of geography is the study of the physical features of earth, it’s atmosphere, and of human activity
