The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.
Answer:
The answer is A
Explanation:
New vaccines protect people from diseases.
Demography is important in planning for the future as it allows experts and policy makers to study the changes in population and respond appropriately through policies that reflect these changes. For instance, they can be able to plan appropriately on how to handle the aging in terms of pensions and welfare
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