Select all that apply What factors affect population growth?

medical professionals taking immunizations to developing countries
natural disasters, floods and earthquakes people moving from one country to another in hopes of a better life
breakthroughs in science
cost of new home permits​

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.

c. asking questions

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