Question

Match the columns I and II, and choose the correct combination from the options given.

	Column I		Column II
a		1	Stable
b		2	Expanding
c		3	Declining

• A. $abc$
  $312$
• B. $abc$
  $123$
• C. $abc$
  $132$
• D. $abc$
  $231$

Answer 1

The correct option is C $abc$

$132$
The age pyramid is a graphical representation of the different age groups in a population.
There are three types of age groups:
●Pre-reproductive age group forms the base of the pyramid.
●The reproductive age group is present in the middle of the pyramid.
●Post-reproductive age group is present at the top of the pyramid.
The shape of the pyramid shows the growth status of the population.

A stable population has an equal abundance of individuals in the pre-reproductive and reproductive age groups. Post-reproductive individuals are less. The population size remains stable, neither growing nor diminishing.

The declining population has more individuals in the reproductive age group than the pre-reproductive age group. Several post-reproductive individuals are also sizable. It is a declining or diminishing population with negative growth.

Expanding population has more individuals in the pre-reproductive age group. Several individuals in the reproductive age group are moderate and those of the post-reproductive age are fewer. The expanding population shows a triangular age pyramid


Final answer
d. $abc$
$132$