Q.Explain how population attributes such as birth rate, death rate, sex ratio, and age distribution together determine whether a population is growing, stable, or declining.

A population's future growth trajectory is not determined by any single attribute in isolation, but by the combined effect of several population-level properties working together.

Natality (birth rate) and mortality (death rate) are the most direct drivers: if natality (together with immigration) consistently exceeds mortality (together with emigration), the population grows; if the reverse holds, it shrinks; if the two are roughly balanced, the population stays stable.

Sex ratio, the proportion of males to females, affects the population's underlying reproductive capacity — a population with relatively more reproductively active females has a higher potential natality than one skewed heavily toward males, all else being equal, since it is females that bear the offspring.

Age distribution — the proportion of individuals in the pre-reproductive, reproductive, and post-reproductive classes — indicates how much of the current population is yet to contribute to future births. A population with a large pre-reproductive class (an expanding, triangular age pyramid) is set to keep growing even if the per-individual birth rate stays constant, simply because so many individuals are still to enter their reproductive years and add to future natality. Conversely, a population with a shrunken pre-reproductive class relative to older classes (a declining, urn-shaped age pyramid) is likely to shrink over time, since there are comparatively few young individuals to replace those lost to death or ageing. …

Do not treat these four attributes as a simple checklist — explicitly connect them: explain how age distribution specifically adds FUTURE information (via the size of the pre-r …

Do not answer using only natality and mortality and ignore sex ratio and age distribution — the question specifically asks how ALL FOUR attribu …