Zero population growth (ZPG) is a basic demographic term that is important for students to understand during a population unit. ... Therefore, a country that has reached zero population growth has a population where births plus immigration is equal to deaths plus emigration over the course of a year.
Islam came to India in the early 7th century and Islam is the second largest religion in India.
And I think A. is the answer
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A, the Aral Sea, which is a body of water that is shrinking so fast many are calling it "one of the planet's worst environmental disasters."