Refer to the map below to answer the following question: Which of the following best explains why the population in some regions north of the Huang River stayed constant over this time period?

Only a few new groups migrated into or out of the region so this allowed the population to stay constant.
Tang and Song farmers produced rich soil quality, which resulted in a population boom in some regions.
The number of invaders who settled in those regions about equaled the number of Song who fled.
The gains in population from an increased food supply about equaled the losses from constant warfare.

the nationalists wanted a strong central government so the new country wouldn't fall apart.

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the correct answers are the following

a proxy war which functioned as a training field for wwii

republican democratic goverment

national side, leaded by the fascist general franco

the spanish civil war took place between 1936 and 1939 and was fought after a military coup undertaken on the 17th july 1936 by a group of generals that had seceeded from the spanish republican army, under the leadership of general franco, and who aimed to expel the democractically-elected republican goverment from power.

this war became a proxy war in which european powers tested their military equipment. on one side, urss and mexico supported the left-wing republican spanish goverment, while nazi germany and fascist italy supported the national fascist side.

franco managed to win the war in 1939, with the significant contribution of the foreign military support, and became the dictator of spain until his death in 1975.

explanation:

mark brainliest and have a great day!

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.