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Both population health and public health can include very narrow or very large groups of individuals – some public health initiatives encompass entire countries or regions of the world – and both increasingly rely on digital data assets to identify patterns and aid workers as they address critical wellness needs.
This question doesn't make since. it could mean its death rate is lower than its birth rate or it could mean just expansion
Answer: Variation allows some individuals within a population to adapt to the changing environment. Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.