_refers to the number of births during a given period in the population that are added to the initial density.

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Q: (SSC/0)
_refers to the number of births during a given period in the population that are added to the initial density.

question_subject: 

Geography

question_exam: 

SSC

stats: 

0,5,3,5,2,1,0

keywords: 

{'births': [1, 0, 0, 0], 'natality': [2, 0, 0, 0], 'population': [3, 1, 2, 1], 'mortality': [2, 0, 0, 1], 'initial density': [1, 0, 0, 0], 'emigration': [2, 0, 0, 1], 'number': [0, 0, 0, 2], 'immigration': [3, 0, 0, 1], 'period': [9, 3, 3, 8]}

The correct answer is option 1: Natality. Natality refers to the number of births that occur during a given period in a population. It represents the rate at which new individuals are added to the population through reproduction. Natality is an important factor in determining population growth and density. It is the opposite of mortality, which refers to the number of deaths that occur during a given period. Options 2, 3, and 4 are not correct in this context. Mortality refers to deaths, not births. Immigration refers to the movement of individuals into a population, and emigration refers to the movement of individuals out of a population.