In a population of an area, the difference in the natality rate and mortality rate is zero in a particular year, but the population density has decreased. Which of the following may be the reason for that increase?

Question

In a population of an area, the difference in the natality rate and mortality rate is zero in a particular year, but the population density has decreased. Which of the following may be the reason for that increase?, Number of immigrants > Number of emigrants, Number of immigrants / Number of emigrants = 0, Number of immigrants < Number of emigrants, Number of immigrants = Number of emigrants

MARKS App · Accepted Answer

Natality and immigration contribute to an increase in population density, while mortality and emigration tend to decrease the size. The density of a population (N) at time t can be expressed after a period of time (t + 1) as: N (t+1) = N t + [ (B + I) - (D + E) ] where B denotesthe number of births,I denotesthe number of immigrants,D isthe number of deaths andE is thenumber of emigrants. If B=D, and N (t+1) t , then I

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