Answer:
Country A: Stage 2 with a high birth rate and a youthful population and is a developing country.
Country B: Stage 4 with a low birth rate and low death rate with an aging population. It is a developed country and there is a possible Stage 5.
Explanation:
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he conquered the Aztecs in 1521
Answer:
The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas.
Answer:
The radioactive isotope content of a rock can be used to identify the rocks age.
It is formed by plate tectonics
