Question

In a growing population of a country
A. Reproductive and pre-reproductive individual are equal in number
B. Pre – reproductive individual are more than the reproductive individuals
C. Pre- reproductive individual are less than the reproductive individuals
D. Reproductive individual are less than the post- reproductive individuals

Answer 1

The triangular shaped graph is observed in developing countries. The pre-reproductive individuals increased in the developing countries. The number of individuals of reproductive age is less than the pre-reproductive age individuals in the developing countries.

Complete answer:
Population of the country or a place refers to the number of individuals in the particular area. It mainly depends on factors: Birth rate, death rate, immigration and emigration. If the birth rate in the particular region is very high then the death rate. It can lead to the over-population and can cause scarcity of resources. The type of individual present in a particular area can be determined by the age –pyramids. There are mainly three types of age pyramids are observed: triangular or pyramid shaped, bell shaped or urn shaped. The lower part represents pre-reproductive age; middle represent reproductive age individuals and the upper part represent post- reproductive age individuals or old age individuals.
If the number of pre-reproductive individuals is very large, the number of reproductive individuals is moderate and post-reproductive individuals are fewer than it refers to as a growing or expanding type of population. Triangular type of age pyramid can be seen by this type of population. It shows the growing population. The rate of growth of the population depends upon the size of the pre-reproductive population.

Thus, the correct answer is option B.

Note:
The pyramid shaped age-graph is mainly representing the developing country graphs of the populations such as India. The stable graph or bell shaped graph can be observed for the developed country and the urn shaped graph can be observed in disaster affected areas or countries. The developing countries should try to maintain their population in order to make their country more stable.