Question

one cause of decreasing population in some countries​

Answer 1

Answer:

Causes of population decline

fewer children are born; families with children move to larger towns and cities; young and better-educated people move to larger towns and cities.

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Answer 2

Answer:

The decline in U.S. population growth is likely due to a confluence of factors: lower levels of immigration, population aging, and declining fertility rates. A drop in net immigration to the United States is a key factor in the country's declining population growth rate.