Question

Study of population trends is
(1) Kalography
(2) Psychobiology
(3) Biography
(4) Demography

Answer 1

study of population trends is psychology.

Answer 2

Answer:

Study of population trends is Demography.

Explanation:

Study of population trends is known as demography. It is referred to the scientific study of population in terms of its size, density and distribution. This is studied with reference to certain vital statistics like birth, migration, death, income, onset of diseases in population, which are the major causes for fluctuating population sizes.  

Studying demographic patterns in a population, area or country is important to understand the economic fluctuations relative to population sizes that should ideally be able to “sustain the population”.