The answer would be Europe
Answer:
Savanna grassland is known as the zoo of the world because It is the second largest vegetative belt of the world. ... Therefore, food chain and ecosystem remains healthy and balanced that it turns minimum space for the growth reproduction and spread all verities of birds and animals so, it is known as the zoo of the world.
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The wanted all states to be a part of the Union and abolish slavery.
I think c because this is when huge factory cities were booming and also due to crisis in their home countries
