Declining birth rate, all the pollutions, crowding , and house shortage
A) Correct
b) Incorrect
c) Incorrect
d) Correct, but not the best answer
Head River
All rivers have a starting point where water begins its flow. This source is called a headwater. The headwater can come from rainfall or snowmelt in mountains, but it can also bubble up from groundwater or form at the edge of a lake or large pond.
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